Pepper Sirloin Steak Recipe

Lightly score edges of steak at 1" intervals. Preheat grill or broiler. Combine butter, parsley, onion, Worcestershire sauce, pepper and mustard in a small saucepan. Heat stirring continually, over low heat, until butter melts. Reserve 1/4 of the mixture. Place steak on grill or broiler pan. Brush steak with butter mixture. Cook, basting frequently with butter mixture, about 6 minutes per side for medium. Place steak on a serving platter. Cut thin slices across the grain. Drizzle reserved butter mixture over steak.