Let the meat come to room temperature for 30 minutes before forming the burger patties.
The key to a tender burger is to very lightly handle your ground beef. Sprinkle the beef with salt and black pepper & gently form four 1”-thick patties.
Grill the patties over high heat for 3 to 4 minutes on the first side. Flip and top with the grated cheese. Cook for 3 to 4 minutes on the second side for medium-rare burgers.
Let the burgers rest for 5 minutes before serving.
Pit, peel, and thinly slice your avocado. At serving time, nestle each patty into a large leaf of butter lettuce. Top with avocado slices, pickled onions, and plenty of ground black pepper.