This air fryer grilled cheese recipe takes a gourmet twist with the addition of pesto and mozzarella cheese. Start by spreading a layer of pesto sauce on one slice of whole grain bread, top with slices of fresh mozzarella cheese, and sprinkle with a pinch of salt and pepper. Place another slice of bread on top and lightly brush the outside of the sandwich with olive oil. Cook in the air fryer at 375°F for about 5 minutes, or until the bread is golden brown and the cheese is melted. The combination of the fragrant pesto and the creamy mozzarella creates a delicious and satisfying grilled cheese sandwich.