01 - Toast all 6 bread slices in a toaster until golden brown and lightly crisp.
02 - Spread mayonnaise evenly over one side of each toasted bread slice.
03 - Place 2 toast slices mayo-side up on a flat work surface. Layer each with half of the turkey or chicken, 1 slice of ham if using, 2 bacon slices, tomato slices, and lettuce. Season lightly with salt and pepper.
04 - Top each stack with a second toasted bread slice, mayo-side up. Repeat the layering with remaining turkey or chicken, ham, bacon, tomato, and lettuce. Season again with salt and pepper.
05 - Cap each sandwich with the third toasted bread slice, mayo-side down. Insert 2 toothpicks through each sandwich to hold the layers together, then cut diagonally into quarters to create classic wedge-shaped sections. Serve immediately.