Divide the beef into 2-ounce portions and form into balls; you will have 28.
Heat a large skillet or griddle over medium-high heat. Working in batches, place the beef balls on the surface and use a large spatula to smash them as flat as they can possibly go. Sprinkle with salt and pepper. Cook for 2 minutes.
Flip and immediately place a slice of cheese on half of the patties. Thirty seconds later, transfer the other patties onto the ones with the cheese. Wait a few seconds, then place on the buns. Keep going until you have 14 burgers.
Serve with lettuce, pickles and tomatoes on the side.