Prepare a medium-hot gas or charcoal fire. When the grill is hot, clean the grill racks by rubbing them with a grill brush and a wadded up paper towel.
Put the ground meat in a medium bowl and add 1 tsp. salt and ½ tsp. pepper. Mix gently and briefly to avoid overworking the meat. Shape the seasoned meat into 4 patties about 1-inch thick.
When the grill is hot, grill the burgers for 5 minutes on one side, and 4 minutes on the other for medium rare (see note below). Don't press down on the burgers as this will press out the juices.
Transfer the burgers to a plate and tent with foil, while you toast the buns cut-side down. Serve the burgers wtih one of the toppings.
Notes
Note: For medium burgers, cook for 5 minutes on each side. For medium-well burgers, cook 7 minutes on one side, and 5 on the other side. For well-done burgers, cook 7 minutes on each side.