Mix beef, onion, and ground pepper together and form 4 patties of equal size about 3/4" thick.
Grill or broil, 4" from souce of heat, for 3 minutes on each side for medium-rear. Place 1 to 2 Tbsp on the center of each patty and top with one 1 oz. slice of low-fat Swiss cheese.
Grill for 1 to 2 minutes, until the cheese melts.
Serve each patty open-face on a slice of toasted or grilled light rye bread. Top with each serving with 1 Tbsp Russian Dressing.
Servings: