These spinach and mushroom quesadillas are a great way to get your daily dose of greens. Simply sauté some mushrooms and spinach with garlic and onion, and then add them to a tortilla with some shredded cheese. Cook the quesadilla on a griddle or in a pan until the cheese is melted and the tortilla is crispy. Serve with a dollop of sour cream and some salsa for a delicious and satisfying meal.