Sloppy Joes

1 lb ground beef
1/4 cup yellow onion (chopped)
1/4 cup green pepper (diced)
2 cloves garlic (minced)
1 tsp prepared mustard
1 6 oz. can tomato paste
1 1/4 cup water
3 tsp brown sugar
1 tsp chili powder
salt and pepper to taste

Place ground beef in a large skillet.  Cook until browned.  Drain.  Return to medium heat and add remaining ingredients.  Bring to a boil.  Reduce heat and let simmer for 10 minutes.  Serve on buns.