Method
Combine ground beef, salt and pepper. Form into 4 patties, 3/4-inch thick.
Grill over medium heat or medium coals to internal temperature of 160 degrees F.
During last 2 minutes of grilling, top each burger with a slice of cheese and allow to melt. Remove from grill.
Top each patty with a slice of apple. Spread spicy mustard over bun. Serve.
Courtesy of the Texas Beef Council