This healthy twist on a classic grilled cheese sandwich features creamy avocado and juicy tomatoes. The air fryer gives the sandwich a crispy exterior while keeping the inside gooey and delicious. To make this recipe, spread mashed avocado on one slice of whole wheat bread, top with sliced tomatoes, 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. Enjoy this nutritious and flavorful grilled cheese as a satisfying lunch or dinner option.