01 -
Preheat your air fryer to 375°F (190°C) for 3-5 minutes.
02 -
In a medium-sized mixing bowl, add the drained tuna, mayonnaise, diced red onion, diced celery, chopped fresh parsley, lemon juice, Dijon mustard, salt, and black pepper. Mix well.
03 -
Butter the outer sides of each slice of bread evenly.
04 -
On one side of the bread, spread a generous portion of the tuna salad mixture. On the other slice of bread, place two slices of cheddar cheese. Place the top onto the bottom to make the sandwich.
05 -
Carefully place the prepared tuna melt sandwiches into the air fryer basket, ensuring they are not overlapping.
06 -
Air fry the tuna melts at 375°F (190°C) for 5-7 minutes, flipping halfway. The bread should be golden brown and crispy, and the cheese should be melted and bubbly.
07 -
Once cooked, carefully remove the tuna melts from the air fryer and let them cool for a minute before serving.