Easy Vegan Mushroom Quesadilla with Cashew Mozzarella. These Spinach mushroom quesadillas have a delicious caramelized mushroom filling and gooey cashew mozzarella! Add beans for a hearty meal. Vegan Recipe, Easily Gluten-free, Soyfree. I am back with my favorite flavors in the nicely golden mushrooms with some onion and spinach, and then layered w...