Oven Roasted Sheet Pan Portobello Mushroom Fajitas (Vegan + Gluten-Free)

A Healthy, Mouthwatering & Easy To Make Sheet Pan Portobello Mushroom Fajita Dinner. 7 Ingredients, A Few Spices & Toppings. Dinner Is Ready In Under 30 Minutes. 

Jump to:

• Are Mushrooms A Good Source Of Protein?
• What Is A Serving Size Of Portobello Mushrooms?
• What Are The Health Benefits Of Eating Portobello Mushrooms?
• Are Portobello Mushroom A Good Meat Substitute?
• Ingredients To Make Meatless Fajitas
• How To Make Sheet Pan Mushroom Fajitas
• How To Julienne A Bell Pepper
• Can I Make This A Vegan Chili's Mushroom Jack Fajita
• Storage
• Looking For Other Vegan Gluten-Free Mexican Inspired Recipes? Try These Out:
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• Pin This Recipe For Later!

Are Mushrooms A Good Source Of Protein?

Mushrooms are a ok source of protein. A cup of mushrooms has about 4g of protein. Mushrooms are not the highest source of vegetable protein. One of the highest, Lima beans has 11.6g of protein per serving as compared to broccoli at 3g per serving on the lower end.

Adding black beans is a great protein boost for this recipe.

What Is A Serving Size Of Portobello Mushrooms?

We calculate 2 to 3 mushrooms for each individual servings depending on size of mushroom and hunger level.

One cup (~3oz) of mushrooms is considered a typical serving size according to WebMd. Large portobello caps can range from approximately 2.5 oz to 6 oz.

What Are The Health Benefits Of Eating Portobello Mushrooms?

They are low in calories, high in potassium, a good source of copper, niacin (B3) and if grown under UV light good for vitamin D. Mushrooms are the only vegan, non-fortified dietary source of vitamin D.

Are Portobello Mushroom A Good Meat Substitute?

Yes, they make a great substitute because of the rich umami flavor they have and a texture that is similar to animal protein. Did you know technically mushrooms are not a vegetable; they belong to the fungi kingdom. Although they are not vegetables, mushrooms provide several important nutrients.

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Mushrooms make a great “meaty” substitute for beef. Roasting them along with the onions and peppers during the roasting process; transforms them into a super savory selection.

Ingredients To Make Meatless Fajitas

• Portobello Mushrooms
• A Red Onion
• Red, Yellow and Orange Bell Peppers
• Fajitas Seasoning Mix - which is a simple mix of chili, cumin, cayenne, smoked paprika, onion and garlic powders. We used store-bought but this is a simple homemade recipe.
• Olive Oil
• Limes
• Avocado
• 2 packages of Gluten-Free Corn Tortillas or Almond Tortillas

Note: this recipe makes about 9 good size fajitas

How To Make Sheet Pan Mushroom Fajitas

Preheat oven to 400 degrees. Place pieces of parchment on two full size baking sheets.

Prepare vegetables by slicing mushrooms, bell peppers and onions and placing on baking sheets.

Prepare mushroom marinade by mixing olive oil, lime juice, fajitas seasoning pack and a few tablespoons of water.

Drizzle the marinade over the veggies. Use both hands to toss the vegetables until evenly coated mixture.

Spread vegetables out evenly, do not crowd pan (a crowded pan can lead to steamed veggies instead of nicely caramelized roasted veggies).

Roast mixture for about 20 minutes or until the vegetables have a nice golden color.

Serve with tortillas, sliced avocado, squeeze of fresh lime juice over top and a dollop of vegan sour cream.

How To Julienne A Bell Pepper

Simply remove the top and bottom of pepper

Cut the pepper open. Run the blade along the inner edge of the pepper to remove seeds.

Flatten pepper with finger and begin julienning it.

Can I Make This A Vegan Chili's Mushroom Jack Fajita

This can easily be transformed into a copycat Chili's Mushroom Jack dish that's vegan, vegetarian, gluten-free and allergen friendly. Add the following ingredients:

• Faux Grilled Chicken - we love the Dang brand of grilled plant-based chicken and Recipes by Jenn directions on marinating the "chicken" if you want to take it one step further
• Plant-Based Bacon - we love Hooray Foods
• Cheese - Chili's uses a shredded Monteray Jack; Miyoko's has a Vegan Pepper Jack selection as well as Whole Food's 365 brand

To serve assemble ingredients into 4 individual bowls. Top with cheese, bacon and dollop of vegan sour cream.

Storage

Store in an airtight container with lid for up to a ¾ days.

Looking For Other Vegan Gluten-Free Mexican Inspired Recipes? Try These Out:

• Vegan Cauliflower Tamale Pie
• Pecan Taco Bowl
• Vegan Gluten-free Tacos

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These nutritional figures should be considered estimates. Varying factors such as product types or brands purchased, natural fluctuations in fresh produce, and the way ingredients are processed change the effective nutritional information in any given recipe.

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