Grass-fed Beef Burgers, a quick and easy method by cucinagirl

grass-fed ground beef
kosher salt (1/2 tsp per pound)
freshly ground pepper (to taste)

Simply season the ground beef with kosher salt and pepper and shape loosely into 4-ounce patties that are thinner in the middle than around the edges. 

Grill for about 3 minutes per side.  Add cheddar cheese to the patties about a minute before they are done and cover the grill pan with foil (or close the grill) to melt the cheese.