Crispy Mushroom, Spinach and Avocado Quesadillas

This is a great take on quesadillas. I added a can of black beans to the red onion and mushrooms, right before adding the spinach to make for a more substantial filling. I used brown rice tortillas to make the recipe gluten-free. I was skeptical about how well putting the cheese on the outside of the quesadilla would work, but it turned out great! It got crispy and delicious. As the recipe suggested, I used my cast iron pan and had great results!