Wash the apple thoroughly and slice it into 1cm thick rounds.
Season the chicken breast for the patty with salt and pepper, then cook it in a pan until fully cooked.
Drizzle a bit of lemon juice over the apple slices to prevent discoloration.
Place a chicken breast patty, sliced cheese, and lettuce between two apple slices.
Add a little mustard or mayonnaise sauce to taste.
Plate the apple burger and it's ready to serve.