Sloppy Joes

1 lb. ground beef
Wheat hamburger buns
1 cup wheat berries (if you desire)
¾ cup ketchup
1 tsp. mustard
1 tbsp. brown sugar
Salt to taste
¾ cup water
2 tsp. vinegar
1 chopped onion

Brown hamburger and onion. Add the rest of the ingredients and cook until blended and hot. Serve on a wheat bun.