All American Barbecue
["4 1/2 lb. ground beef", "1 1/2 c. chopped onion", "2 1/2 c. ketchup", "3 Tbsp. mustard", "3 Tbsp. Worcestershire sauce", "2 Tbsp. vinegar", "2 Tbsp. sugar", "1 Tbsp. salt", "1 Tbsp. pepper", "18 hamburger buns"]
["Cook beef and onions in Dutch oven until tender, drain. Combine ketchup, mustard, Worcestershire sauce, vinegar, sugar, salt and pepper.", "Stir.", "Heat through.", "Serve on hamburger buns."]
["ground beef", "onion", "ketchup", "mustard", "Worcestershire sauce", "vinegar", "sugar", "salt", "pepper", "buns"]