Wash and slice lettuce, tomato, and onion thoroughly.
Cook bacon in a pan until crisp.
Toast the bread slices in a toaster or pan until golden brown.
Fry eggs in a pan, keeping the yolk intact.
Spread mayonnaise on the toasted bread slices.
Layer lettuce, tomato, onion, bacon, and fried egg on the bread slice in order.
Cover with another slice of bread and slice for easy eating.