Combine quarter cup of the Worcestershire sauce, lemon juice, oil, minced onion, salt and minced garlic; mix well and set aside. Place steak in tight-fitting bowl or plastic bag. Pour Worcestershire sauce mixture over steak. Marinage 2 hours. Remove from marinade. Place on rack. Grill over hot charcoal or broil under preheated hot broiler for 7 to 10 minutes on each side or until done as desired, brushing occasionally with leftover marinade. Remove steak to serving plate. In a small saucepan melt butter. Stir in parsley and remaining 1 teaspoon Worcestershire. Pour over steak. Slice and serve.