Barbecue Beef Burger
["1 lb. beef (do not brown first!)", "1/2 c. ketchup", "1 Tbsp. sugar", "3/4 Tbsp. mustard", "1/2 Tbsp. vinegar", "3/4 tsp. Worcestershire sauce", "1 Tbsp. butter", "1/4 c. chopped onions", "1/2 tsp. salt", "dash of pepper", "small amount of water (enough to moisten)"]
["Cook slowly in thick saucepan 45 minutes to 1 hour.", "Makes 6 to 7 sandwiches."]
["beef", "ketchup", "sugar", "mustard", "vinegar", "Worcestershire sauce", "butter", "onions", "salt", "pepper", "amount of water"]