Grilled portobello mushroom and squash quesadillas with peppers make for excellent quesadilla filling for a healthful summer-inspired meal.

Grilled Portobello and Summer Squash Quesadillas with bell peppers and guacamole | #healthy #dinner #recipe #bbq

Charred grilled veggies.

Melty cheese.

Crispy tortilla.

The trappings of tongue bud bliss.

I can’t think of many foods that entice me more than a fully-loaded super gooey, ultra crispy quesadilla. Perhaps because the cheese ’tilla has been a source of comfort from a young age.

Maybe because the combination of ooze interior and crunchy crisp exterior makes for a menu of pleasurable textures.

Possibly because melted cheese is life.

Perhaps because tortillas are the alpha omega of all the carbs.

Whatever the reason, there’s some history there.

While quesadillas have always been a straight shot to my heart and soul, I admit, as a kid I was pretty plain vanilla about my filling preferences – I went full-tilt jack & cheddar, no frills, no add-ins, not even salsa, hold the guac, just bring on the cheese puh-lease.

One of the best aspects to these squash quesadillas is how adaptable they are. Here are some…

Recipe Adaptations:

  • Make these quesadillas vegan by replacing the cheese with guacamole. It may sound strange, but trust me, it works!
  • Use gluten-free tortillas if desired.
  • Add grilled chicken or shrimp for a protein infusion.
  • Serve with black beans and rice to make a well-rounded vegetarian meal.
  • Rather than grilling the vegetables, you can roast them. To do so, preheat the oven to 400 degrees F, then toss the chopped veggies in olive oil and sea salt. Spread them over a large baking sheet (or two), and roast until golden brown and crispy, about 20 to 30 minutes (turning once half-way through).
  • Incorporate any of your favorite veggies, such as cauliflower, sweet potato, tomato, eggplant, butternut squash, etc. If it can be grilled or roasted, you’re good to go!
  • Get shmancy with your cheese selection. You can use aged cheddar, smoked gouda, gruyere, fresh mozarella, brie, goat cheese, etc.
  • Rather than preparing the quesadilla on the stove top, you can grill it as well.
  • If you eat a dairy-free diet, be sure to check out my Grilled Vegetable Avocado Quesadillas, which uses avocado instead of cheese!

Grilled Portobello and Summer Squash Quesadillas with bell peppers and guacamole | #healthy #dinner #recipe #bbq

And there you have it! Your formula to an easy-to-prepare flavor-packed ooey gooey melted cheese experience.

My cookbook, Paleo Power Bowls, is now available! CLICK HERE to check it out. Thank you for your support!

Grilled Portobello and Summer Squash Quesadillas with bell peppers and guacamole | #healthy #dinner #recipe #bbq

Grilled Portobello and Summer Squash Quesadillas

5 from 1 vote
Level up your summer with these Grilled Portobello and Summer Squash Quesadillas!
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Servings: 6 Quesadillas


  • 1 red bell pepper cored and quartered
  • 1 orange bell pepper cored and quartered
  • 1 pasilla pepper cored and halved
  • 1 red onion cut into thick rounds
  • 2 medium zucchini squash sliced into 1/4-inch strips
  • 2 patty pan squash sliced into 1/4-inch rounds
  • 2 portobello mushrooms
  • 6 large gluten-free flour tortillas
  • 2 to 3 cups mozzarella cheese grated


  • Preheat the grill to medium high. Brush all of the vegetables with olive oil and sprinkle with sea salt.
  • Place the vegetables on the hot grill and cover. Cook for 5 to 8 minutes, flip and continue grilling another 5 to 8 minutes, or until charred and soft. Transfer vegetables to a cutting board and chop into bite sizes.
  • Heat a skillet to medium-high and add enough oil to lightly coat the surface.
  • Place one large flour tortilla on the hot skillet and sprinkle desired amount of mozarella cheese (I use about 1/4 to 1/3 cup per quesadilla) over the whole tortilla. Cook for about 30 seconds to 1 minute, or until cheese is mostly melted.
  • Layer a generous amount of vegetables over half of the tortilla, then fold tortilla in half. continue cooking until tortilla reaches desired level of crisp. Transfer to a cutting board and chop into pieces. Repeat for remaining ingredients.


Serving: 1Quesadilla · Calories: 484kcal · Carbohydrates: 61g · Protein: 20g · Fat: 18g · Fiber: 4g · Sugar: 6g
Author: Julia
Course: Lifestyle
Cuisine: American
Keyword: grilled vegetable quesadillas, healthy quesadilla recipe
Did You Make This Recipe?I want to see it! Tag @the.roasted.root on social media!


Julia Mueller
Meet the Author

Julia Mueller

Julia Mueller is a recipe developer, cookbook author, and founder of The Roasted Root. She has authored three bestselling cookbooks, – Paleo Power Powers, Delicious Probiotic Drinks, and The Quintessential Kale Cookbook. Her recipes have been featured in several national publications such as BuzzFeed, Self, Tasty, Country Living,, etc.

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Questions and Reviews

  1. These look awesome- love all your different options, especially the guac subbed for cheese… never tried it in a quesadilla but guac is great on everything!