The Beseda Hall in Tabor, South Dakota makes the best taverns which they serve after wedding dances. I got this recipe from one of the Altar Society members and frequently use it when I have to make a large batch of taverns for concession stands, etc.
Brown ground beef with the onion and drain off grease. Spray electric roaster with non-stick spray and combine all ingredients in roaster. Heat to simmer. Do not drain off the juice. Will serve 100 easily.