Barbecue Chuck Roast
["3 lb. chuck roast (1/2 to 3-inch thick)", "1/3 c. wine vinegar", "1/4 c. catsup", "2 Tbsp. salad oil", "2 Tbsp. soy sauce", "1 Tbsp. Worcestershire sauce", "1 tsp. prepared mustard", "1/4 tsp. garlic powder"]
["Combine all ingredients.", "Plus add 1 teaspoon salt and 1/4 teaspoon pepper.", "Pour mixture over roast.", "Marinate 2 to 3 hours. Place on grill and baste.", "Serves 6 to 8 people."]
["chuck roast", "wine vinegar", "catsup", "salad oil", "soy sauce", "Worcestershire sauce", "mustard", "garlic powder"]