Cook the bacon until crispy and drain on paper towels.
Toast the slices of bread until golden brown.
Spread mayonnaise on one side of the first slice of bread.
Layer lettuce and tomato slices on top of the mayonnaise.
Add two slices of bacon over the tomatoes.
Place the second slice of bread on top, mayonnaise side up.
Repeat layering with lettuce, tomato, and bacon.
Top with the third slice of bread, mayonnaise side down.
Secure the sandwich with toothpicks and cut into quarters.
Serve immediately and enjoy!