These Apple, Cheddar, and Onion Quesadillas are a delicious twist on the classic Mexican dish. The combination of sweet apples, sharp cheddar cheese, and caramelized onions creates a flavorful and satisfying filling. The quesadillas are then toasted until golden and crispy, making them the perfect appetizer or light meal. Serve them with a side of salsa or sour cream for dipping, and enjoy the delightful blend of flavors in every bite.