The combination of chicken, onion, red bell pepper, and zucchini in this air fryer quesadilla recipe is classic! The fresh flavored veggies complement the succulent chicken well. If you’d like to make a vegetarian quesadilla, you could try substituting the chicken for mushrooms, black beans, or a ‘mock’ chicken.  You could also try different colored peppers to alter the flavor, and tomatoes and corn are great additions.