Gather bread slices, cooked chicken or turkey, bacon, lettuce, tomato, mayonnaise, salt, and pepper
Toast the bread slices
Spread mayonnaise on one side of each bread slice
Season tomato slices with salt and pepper
Place lettuce and tomato on the first slice of bread
Add chicken or turkey slices on top
Cover with the second slice of bread, mayonnaise side down
Spread mayonnaise on the top of the second slice
Add bacon, lettuce, and tomato on top
Place the third slice of bread on top, mayonnaise side down
Cut the sandwich into halves or quarters
Secure with toothpicks if needed
Serve immediately