01 -
Preheat a large non-stick skillet over medium-high heat. Lightly butter one side of each tortilla using about ½ teaspoon butter per tortilla. Place one tortilla butter-side down in the hot pan.
02 -
Sprinkle ⅓ cup of mozzarella cheese over the tortilla in the pan. Add the pizza sauce, spreading it evenly but not all the way to the edges. Distribute the halved pepperoni pieces and sliced basil if using.
03 -
Top with the remaining ⅓ cup of mozzarella cheese, then place the second tortilla on top with the butter-side facing up. Press down gently to help everything stick together.
04 -
Cook for 2-3 minutes without moving the quesadilla. You'll know it's ready to flip when the cheese starts melting and the bottom tortilla is golden brown with crispy edges.
05 -
Carefully flip the quesadilla using a large spatula. Cook the second side for another 2-3 minutes until the tortilla is crisp and golden, and all the cheese is completely melted.
06 -
Transfer the quesadilla to a cutting board and immediately cut into 4-6 wedges using a sharp knife or pizza cutter. Serve hot while the cheese is still melty and the tortillas are crispy.