01 - Toast all 6 bread slices 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 work surface. Layer each with half of the turkey or chicken, a slice of ham if using, 2 bacon slices, tomato slices, and lettuce. Season with salt and pepper.
04 - Top each stack with a second toasted bread slice, mayo-side up.
05 - Repeat the layering with the remaining turkey or chicken, ham, bacon, tomato, and lettuce on top of the middle bread slice.
06 - Finish each sandwich with the third toasted bread slice, mayo-side down. Secure each with 2 toothpicks and cut diagonally into quarters for classic club sandwich wedges.
07 - Serve immediately, accompanied by chips or a side salad if desired.