These pepperoni and cheese quesadillas are a quick and easy lunch or snack. To make these quesadillas, you will need flour tortillas, shredded mozzarella cheese, sliced pepperoni, and any other toppings you desire. Heat a non-stick skillet over medium heat. Place a tortilla in the skillet and sprinkle shredded mozzarella cheese over half of the tortilla. Add the sliced pepperoni and any other toppings you desire. Fold the tortilla in half and press down with a spatula. Cook for 2-3 minutes on each side or until the cheese is melted and the tortilla is golden brown. Slice and serve hot.