Break the beef into four pieces then form them into balls.
Place the balls on the preheated flat top grill and flatten with the spatula. Sprinkle the top with the diced onions, salt, and pepper.
Cook until browned then turn and cook on the other side until your desired doneness.
To Serve
Add to the flat top grill the bacon and eggs; cook until your desired doneness. Lightly toast the hamburger buns.
For each burger layout the toasted buns on a work surface. On the top half add the mayonnaise, lettuce, tomatoes, and a few slices of pickled beets. On the top half add the ketchup, smash burger, bacon, and fried egg. Close both sides together to complete the burger.Tip: If using a soft yolked egg, break the yolk before assembling otherwise it can burst while biting and become quite messy.