Barbecued Roast
["1 to 3 lb. chuck roast", "1 large onion, chopped", "1 (6 oz.) can tomatoes", "1 medium pepper, chopped", "1 c. ketchup", "1/4 c. Worcestershire sauce", "2 Tbsp. vinegar", "3 tsp. salad oil", "juice of 1 lemon", "salt and pepper to taste"]
["Place roast in Dutch oven.", "Combine remaining ingredients and pour over roast.", "Cover and bake at 300\u00b0 for 2 1/2 to 3 hours."]
["chuck roast", "onion", "tomatoes", "pepper", "ketchup", "Worcestershire sauce", "vinegar", "salad oil", "lemon", "salt"]