01 - Toast all 12 slices of bread in a toaster or on a grill pan 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 work surface. Top each with lettuce leaves, followed by several tomato slices. Season lightly with salt and black pepper.
04 - Place a second slice of bread mayonnaise-side up on top of each assembled first layer. Arrange sliced chicken or turkey over the bread, then lay cooked bacon strips on top.
05 - Top the bacon and meat layer with additional lettuce leaves.
06 - Place the final slice of bread mayonnaise-side down on top of each sandwich to complete the triple-layered stack.
07 - Insert cocktail sticks through all four corners of each sandwich to hold the layers together. Using a sharp knife, cut each sandwich diagonally into quarters, forming triangle portions.
08 - Arrange the sandwich triangles on a platter and serve immediately alongside potato chips or dill pickles if desired.