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Gluten-free Herb Stuffed Portobello Mushrooms

These bread-less portobello mushrooms are packed with fresh flavours because each delicious bite is gluten-free, low carb and spectacular.
That's right, you don't need any bread!
Portobello mushrooms are the perfect side filled with nothing else but lightly cooked fresh herbs, onion, garlic, fresh ginger and pine nuts, then baked to a golden-warm healthy deliciousness.
stuffed portobello mushroom on a plate with a fork

Are you ready to try one of my favourite side dish recipes?

These bread-less portobello mushrooms are packed with fresh flavours because each delicious bite is gluten-free, low carb and spectacular.
That’s right, you don’t use any bread!

Portobello mushrooms are the perfect side dish filled with nothing else but lightly cooked fresh herbs, onion, garlic, fresh ginger and pine nuts, then baked to a golden-warm healthy deliciousness.

stuffed portobello mushroom on a plate with a fork
Herb-nut stuffed portobello mushroom with a small salad

If you have not tried this recipe on your family or guests before, you’re in for a pleasant surprise.
Not only are they easy to make ahead of time but they are also uncomplicated. One mushroom for one guest . . .  as simple as that.
Unless of course, you can’t resist having a few extras for reheating the next day!

5 Reasons Why I Love This Recipe

  1. Without the breadcrumbs, this dish tastes even healthier and you get more flavours in each bite.
  2. They are easy to make ahead.
  3. There are kid-friendly parts to this recipe for those who have eager helping hands in their kitchen.
  4. The calories can go as low as you like by changing the cheese type and quantity.
  5. This recipe is easily modified to satisfy vegans, vegetarians, or anyone sensitive to gluten.
birds eye view of a stuffed mushroom on a plate with salad

And here's another reason why this recipe should be on your Must-Make menu list

Probably the best reason for making this recipe is: you can customize!

Here’s how:
Don’t like a lot of cheese?
No problem – claim one of the mushroom caps as yours and sprinkle the others with more.

If you love parmesan while your other half adores mozzarella – that’s so easy with this recipe.
You can do the same with a vegan cheese as well.

You can even get down to the details.
Perhaps you prefer your mushroom caps with less stuffing.
Meanwhile your partner wants theirs piled high, but not with pine nuts . . . 

No problem! Here’s what you do: divide the herb-onion mixture and, like a pizza add the extras to custom order. 

Pine nuts will make your mushrooms taste creamier while pumpkin seeds add an earthy crunch.
Both are delicious for different reasons.

Pepitas or pumkin seeds in a small white bowl on wood
Pumpkin seeds
pine nuts in a small white bowl on a wood board
Pine nuts

Talk about some serious win-win versatility with this dish.


And, when everyone loves stuffed mushrooms, you’ll eat them more often. 

What Are Mushrooms

We all know mushrooms have no leaves or flowers and don’t produce any fruit. That’s because they are in fact, the fruit of the fungus.

They first appeared in french cuisine and by the late 1800’s Americans were also adding mushrooms to their dishes.

Today, we have at least 7 common varieties to choose from; the Crimini (brown), Enoki, King Oyster, Oyster, Portabella, Shitake, and White Button mushrooms.
And just in case you wanted to know what the most expensive mushroom is; it’s the heavenly yet rich aromatic truffle, also known as the “diamond of the kitchen.” 

Then there are the intriguing mushrooms.
Have you heard of Lion’s Mane, Brain mushroom and mushrooms that glow in the dark
And then – fun kid alert! – there’s the Dung Canon mushroom known for its ability to accelerate faster than a rocket! 
Or what about the Reishi mushroom, so strong that it was used to make the bricks that built the towers at Manhattans’ MoMA PS1 (Museum of Modern Art).
WOW! A mushroom that is even stronger than concrete!

That’s quite impressive but let’s get back to the recipe, guaranteed much tastier than concrete will ever be.

Portobello mushroom on a wood board
Portobello mushroom with the stem still on

How To Store And Prepare Fresh Mushrooms

Use your mushrooms as soon as possible once you have them in your kitchen. Keep them in a brown paper bag, refrigerated and away from air and sun as this dries out the fine gills responsible for all of those earthy flavours.

Cultivated fresh mushrooms do not need peeling, especially if you are stuffing or broiling them. Their tough yet thick skin not only helps keep a mushroom together as it cooks but adds the more delicate woodsy flavours you may prefer in a light pasta dish or salad.

If you must wash your mushrooms, place them in a colander.
Run a gentle stream of cool water over the mushrooms, for no longer than 2-3 seconds, while you toss them.
Any longer and you’ll bruise and crush the delicate fins or gills found underneath making the mushrooms turn dark brown when cooked.
For some dishes, this is disappointing.


Pat each mushroom dry and use immediately. 
If you’re sauteing mushrooms, allow them to completely dry before you begin.

I find commercial mushrooms need a quick wipe with a slightly damp paper towel to brush away any soil.

A variety of mushrooms dehydrated on a wood board
Various dehydrated mushrooms

What Else You Can Use Mushroom Stems For

Mushroom stems are amazing – keep them and use them.
Do not compost or toss the stems out as their delicate taste creates the most amazing Duxelles mushroom spread.
Or, add finely chopped mushroom stems to your sauce or simmering stockpot.  

One of my favourite things to do when working on a recipe with a large variety of vegetables is to pop any vegetable scraps into a bag and into the freezer until I have enough to make a stock. 
While cooking for one meal you’re also preparing for the next with minimal effort.

How To Make a DIY Vegan And Vegetarian Stock With Mushrooms

1. Gently fry a roughly chopped onion in extra virgin olive oil until soft and golden brown before adding chopped garlic and ginger.

2. Stir until everything is evenly mixed and fragrant before adding 5-6 cups of water.

3. Leave enough room in the pot for your frozen vegetable peels, mushroom caps, carrot tops and tails.

4. Check your fridge for forgotten soft vegetables and herbs. Include herb stems as they also have flavour.

5. Add a teaspoon of chilli flakes and two bay leaves if you like and turn the heat to MEDIUM-LOW.

5. With the lid on, simmer your stock for 45- 60 minutes before turning the heat off. 
Allow vegetables and herbs to sit in the hot stock.

6. Once cool, pour the liquid through a colander into a large, deep bowl.

7. Discard and compost the vegetables. Wash and dry your stockpot, add the stock liquid back and bring to boil on MEDIUM-HIGH. Allow liquids to boil until reduced by half. This concentrates the flavour and makes it easier to freeze one bag of concentrated stock instead of 2 bags of diluted stock.

8. Allow the concentrated stock to cool before pouring into labelled resealable bags. Lay on a flat surface in the freezer so the stock bags freeze with smooth sides. Once frozen re-stack frozen stock bags in a cardboard box to prevent freezer burn.

You may be wondering why I gave you a stock recipe when this is supposed to be all about mushrooms.
Well, Stuffed Mushroom Day is shared alongside Homemade Soup Day on February 4th, so I couldn’t resist!

Stuffed mushroom pieces amongst a salad
Left overs! Warm in the oven, then cut into bite-sized pieces and add to your favourite salad combination. Drizzle dressing after!

How to Make Your Gluten-Free Herb Stuffed Portobello Mushrooms​

Equipment You'll Need

~ Chopping board
~ Chef’s 8″ knife
~ Small frying pan
~ Baking pan
~ Wooden spoon

Optional but preferred: 
~ Aluminium foil 

Top Tip:
For this recipe, I always use aluminium foil and create a two-layered tray with scrunched up edges. 


Instructions (kid-friendly)
~ Peel off enough length of aluminium foil to hold both mushroom caps plus another 6″.
~ Peel off another of the same length. 
~ Place one length on top of the other and scrunch up all sides. 

Make sure you don’t scrunch down but keep the walls tall to keep your mushrooms moist while they bake. This is especially important if you are only baking one or two.

Place your aluminium tray on a regular baking tray.

crunched up aluminum foil create an edge and prevent mushrooms drying out
Scrunch up two layers of aluminum foil to create tall edges and corners

Ingredients You'll Need

Serves: 2
Preparation time: 10 minutes
Cooking time: 15 minutes
Baking time: 40-50 minutes, depending on how soft you like your mushrooms
Oven temperature: 350 degrees F (175 degrees C or Gas Mark 4)

2 medium-sized portobello mushrooms 
1/2 onion, peeled and finely diced
2 garlic cloves, peeled and grated
1/2 teaspoon fresh grated ginger
3 Tablespoon fresh herbs, finely chopped. For this recipe, I used basil.
1 Tablespoon of extra virgin olive oil and extra for the mushroom caps to prevent sticking
2 Tablespoons pine nuts or pumpkin seeds

Topping:
3 Tablespoon parmesan cheese or cheddar cheese

Optional:
Pinch of salt (omit if using parmesan cheese)
1/4 teaspoon chilli flakes in the mixture

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Steps Needed

close view of a mushroom gills and stem

Wipe any soil away from the mushrooms and trim away the last 1/8 inch off each stem if they don’t look fresh. Compost the ends.

Tug and twist each stem away from the cap.
Finely chop the stems.

Mushrooms with stem removed and chopped
Mushrooms with stems removed and finely chopped.

Wash and dry your fresh herbs. 
With your knife, slice the leaves until fine. If your basil is beginning to seed, include the micro leaves as well.
Alternatively, keep the small, delicate leaves aside for an exquisite garnish.

fresh basil on a wood board beside a mushroom

Build an aluminium foil tray (see photo above) and add a drizzle of extra virgin olive oil.

Place both mushroom caps on the oil and move them around.
Lift the caps up and check that they both have a generous coating of oil. This prevents them from sticking.

Checking to see is the mushroom cap has a generous coating of olive oil
Move the bottom of each cap in the oil then check the bottom is evenly coated so it does not stick.

Peel and dice half an onion.
Add olive oil to a small frying pan and add the onion. 
Cook on MEDIUM-LOW heat for 8-10 minutes, or until the onion turns soft and translucent. 

Add grated garlic and fresh ginger. Now add the chilli flakes if you like a little more heat. Stir until mixed and cook for 1-2 minutes, or until aromatic.

Add a pinch of salt if you prefer and stir.

onions in a frypan cooked until translucent
Translucent onions

Add chopped mushroom stems and cook on MEDIUM-LOW heat for 2-3 minutes.

Mushroom stems added to onion garlic and ginger in fry pan

Add fresh herbs to the onion-mushroom mixture and cook for another minute or until herbs have wilted and are fragrant.

Top Tip:
Take your time in each step. You need a soft mixture that easily presses into the mushroom caps without a lot of force.

Adding fresh herbs to the fry pan

Add pine nuts or pumpkin seeds and stir until mixed then cook for another minute, or until fragrant. 

Top tip:
If at each stage, you cook until you can smell the nuts and herbs, you’ve released the oils which make your mushrooms taste even more incredible.
So don’t rush this step either!

Adding pine nuts to the onion herb mix in the fry pan

Remove the pan from the heat and spoon half of the onion-herb mixture into each mushroom cap. 

Press the mixture into the mushroom cap until it is well-packed.

Mushroom caps stuffed with mixture then compressed
Pine nut stuffed portobello mushroom caps
Mushroom caps stuffed with pumpkin seeds
Portobello mushroom caps stuffed with pumpkin seeds

Top with your choice of cheese.
Here, one mushroom cap is sprinkled with parmesan, the other with cheddar.

Two mushroom stuffed caps one with cheddar and one with parmesan cheese
Two stuffed mushroom caps, one with parmesan cheese, the other with cheddar.

Bake at 3350 degrees F, or 175 degrees C or Gas mark 4 for 30-40 minutes, or until the cheese has melted to a golden brown. 
Garnish with finely chopped fresh herb and serve!

Top Tip: 
I accidentally left mine in the oven for over an hour (below) and they both still tasted delicious.
The foil walls really do stop them from drying out!

mushroom cap baked for over an hour
Another reason why I like using aluminium foil with guests - an easy cleanup!

Lessons I learned

Nuts add an extra texture and satisfy the tastebuds.

Fresh herbs are better than dried.

If you adore mushrooms to the moon and back, adding a little ground dried mushroom while cooking the onions gives your dish an extra woodsy flavour boost.  

A variety of mushrooms dehydrated on a wood board
stuffed portobello mushroom on a plate with a fork

Gluten-free Herb Stuffed Mushrooms

Heather
These bread-less portobello mushrooms are packed with fresh flavours because each delicious bite is gluten-free, low carb and spectacular.
That's right, you don't need any bread!
Portobello mushrooms are the perfect side filled with nothing else but lightly cooked fresh herbs, onion, garlic, fresh ginger and pine nuts, then baked to a golden-warm healthy deliciousness.
0 from 0 votes
Prep Time 10 mins
Cook Time 15 mins
Baking time 40 mins
Total Time 1 hr 5 mins
Course Appetizer, Side Dish
Cuisine Italian
Servings 2 people
Calories 185 kcal

Equipment

  • Measuring spoons
  • Chopping board
  • Chef's 8" knife
  • Baking tray
  • Wooden spoon
  • Small frying pan
  • Oven mitts
  • Aluminium foil

Ingredients
  

  • 2 medium Portobello mushrooms
  • 3 tbsp Basil fresh
  • 1/2 onion
  • 2 cloves garlic fresh
  • 1/2 tsp ginger fresh
  • 2 tbsp pine nuts
  • 1 tbsp olive oil extra for the pan
  • 1/4 tsp chilli flakes optional
  • 2 tbsp parmesan cheese

Instructions
 

  • Clean mushrooms and trim the last 1/8 inch off each stem.
    Remove stem from the cap and finely chop them.
  • Wash, dry and finely slice the basil leaves.
  • Build an aluminium foil tray and add a drizzle of extra virgin olive oil before adding both mushroom caps.

Prepare the onion-herb mix

  • Peel and dice half an onion. 
    Add olive oil to a small frying pan and add the onion. 
    Cook on MEDIUM-LOW heat for 8-10 minutes or until the onion turns soft and translucent. 
  • Add grated garlic and fresh ginger. Now add the chilli flakes if you like a little more heat. Stir until mixed and cook for 2 minutes, or until aromatic.
  • Add chopped mushroom stems and cook on MEDIUM-LOW heat for 2 minutes, or until soft.
  • Add sliced basil to the onion-mushroom mixture and cook for another minute or until herbs have wilted and are fragrant.
  • Add pine nuts and stir until evenly mixed, then cook for about 1 minute, or until fragrant. 

Stuffing the mushrooms

  • Remove the pan from the heat and spoon half of the onion-herb mixture into each mushroom cap. 
    Press the mixture into the mushroom cap until it is well-packed.
  • Top with a sprinkling of parmesan or your favourite cheese.
  • Bake at 350° F (175°C or Gas Mark 4) for 40-50 minutes

Nutrition

Calories: 185kcalCarbohydrates: 9gProtein: 6gFat: 16gSaturated Fat: 2gCholesterol: 3mgSodium: 94mgPotassium: 406mgFiber: 2gSugar: 4gVitamin A: 323IUVitamin C: 4mgCalcium: 78mgIron: 1mg
Keyword Baked, easy, Low-carb, vegetarian
Tried this recipe?Mention @wholefoodstudio or tag #wholefoodstudio!

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