Sloppy Joes
["1 lb. ground beef", "1 medium onion, chopped", "1/2 c. catsup", "2 tsp. mustard", "2 tsp. vinegar", "2 Tbsp. brown sugar", "1 tsp. margarine", "2 tsp. flour"]
["Brown ground beef and onion.", "Drain.", "Mix rest of ingredients in small bowl while browning ground beef.", "Mix with ground beef and simmer for 20 minutes."]
["ground beef", "onion", "catsup", "mustard", "vinegar", "brown sugar", "margarine", "flour"]