Sloppy Joes

1 lb. Ground beef
1 green pepper, chopped
Small onion chopped (or dried)
2 Tbsp Sugar
2 Tbsp Mustard
2 Tbsp Vinegar
1 1/2 cups Ketchup
4-6 Hamburger Buns

Brown ground beef, add chopped green pepper and onion. Cook well. Add sugar, mustard, vinegar and ketchup. Heat until bubbly and serve on warm buns.