Cook the bacon over medium heat in a nonstick skillet until golden brown and crisp, about 5 minutes on the first side and 2 minutes on the second side. Drain on a paper towel.

Lightly toast bread of your choice.

Spread the mayonnaise on each slice of toast. Lay 2 slices of bacon over the mayonnaise on a slice of toast. Top with tomato slices and lettuce. Cover with a second slice of toast. Cut in half and serve immediately.