3 lb. chuck roast
1/3 c. wine vinegar
2 tbsp. cooking oil
1 tbsp. Worcestershire sauce
1 tsp. mustard
1/4 tsp. pepper
1/4 c. catsup
2 tbsp. soy sauce
1 tsp. salt
1/4 tsp. garlic powder

Place roast in a shallow baking dish. Combine remaining ingredients. Pour over roast and marinate for 2 to 3 hours or overnight turning once or twice. Place roast on grill or broiler pan. Serves 6 to 8.