Divide beef into 4 equal portions. Roll each portion into a ball, then flatten with palms of hands. Grill or pan fry over med-low heat 3 min on each side or until patties have reached desired doneness.
On a griddle or flat frying pan, cook the bacon until it is crispy (or however you like it).
On the same griddle or frying pan, crack the eggs and let them cook until the whites are mostly firm and yolk has not hardened. Flip the eggs and let them cook just a few seconds more. If the griddle or pan is large enough, you can cook the eggs, bacon, and burgers at the same time.
Place each burger patty on the bottom half of bun. Top with bacon and then over easy egg. Top with top half of bun and serve. These go great with some hot sauce such as Cholula or Tapatio.