Pre-heat the air fryer basket to 180C for 1-2 minutes.
Take your bread, layer up the cheese and ham. I like to use sliced ham and sliced cheese for convenience, but you can see below for some other tasty suggestions.
Make a sandwich up.
Spread the outside of the bread with the butter or mayonnaise.
Air fry for 10 minutes at 180C (355F) and turn 5 minutes in. You CAN skip the flipping if you're short on time or effort as this only makes a very marginal difference to the cooking and browning of this sandwich.
Serve the grilled ham and cheese with your choice of crisps or even a nice side salad to make it a little more balanced.