1 lb ground beef,cooked
1 medium onion, small diced
1 tab chili seasoning
1 tab mustard
1/4 cup cider vinegar
1/4 cup white sugar
1 large bottle, Heinz ketchup
Brown hamburger in a medium saucepan; while meat is browning, dice up onion and add to meat. Cook meat and onion until no longer pink. (If meat is fatty, drain but leave some grease for flavor.) Add the chili seasoning and mustard to meat mixture, while keeping a low flame under saucepan, stir. Add vinegar and sugar. Stir this mixture slightly.
While stirring, add ketchup a little at a time to desired consistency. Cook for 45 - 50 minutes on low heat, stirring often.
Note: If you cook the sauce uncovered, it will become somewhat thicker, if you have added too much ketchup.