Spanish Taverns

Description
I always called these sloppy joes and had never heard them called taverns until my daughter-in-law called them that. I guess it just depends on what part of the country you are from. We have garage sales here and she calls them rummages.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1½ cups water
 * ½ cup ketchup
 * 1 tbsp chili powder
 * 1 large onion, chopped
 * 1½ – 2 lbs ground beef
 * 2 tbsp mustard
 * salt and pepper, to taste

Directions

 * 1) Combine the first 4 ingredients and cook for 7 minutes.
 * 2) Add the rest of the ingredients and simmer for 10 minutes.
 * 3) Serve on buns.