1 1/4 lbs. 90% fat free ground beef
1/4 c. finely chopped red onion
2 tbsp. capers, chopped
1 tbsp. Dijon mustard
2 tsp. Worcestershire sauce
1/2 tsp. pepper
1/4 tsp. salt

Heat broiler and broiler pan. Mix all ingredients; shape into 6 patties. Broil 4 inches from heat 1 1/2 minutes per side for medium-rare.