A BLT sandwich is a classic combination of bacon, lettuce, and tomato. Start by cooking bacon until crispy. Toast two slices of bread and spread mayonnaise on one side of each slice. Layer lettuce, tomato slices, and the cooked bacon on one slice of bread. Top with the second slice of bread, mayo-side down. Cut the sandwich in half and enjoy this simple yet delicious meal. You can also add avocado or a fried egg for extra flavor and texture.