01 - Toast all 12 slices of bread until golden brown. Lightly butter each slice if desired for added richness.
02 - Spread mayonnaise evenly over one side of each toasted bread slice.
03 - Place 4 bread slices mayonnaise-side up on a flat surface. Top each with lettuce leaves and several tomato slices. Season lightly with salt and black pepper.
04 - Place a second bread slice mayonnaise-side up on top of each first layer. Arrange sliced chicken or turkey evenly, then layer with cooked bacon strips.
05 - Top the bacon with another layer of fresh lettuce leaves. Place the final bread slice mayonnaise-side down to complete each triple-decker sandwich.
06 - Insert cocktail sticks at all four corners of each sandwich to hold the layers together. Using a sharp knife, cut each sandwich diagonally into quarters to form triangles.
07 - Arrange the sandwich triangles on a plate and serve immediately with potato chips or pickles on the side.