Sloppy Joe's

Sloppy Joe's 2 lbs hamburger 1 onion, diced 2 (8 ounce) cans tomato sauce 2 -3 tablespoons Worcestershire sauce 1 tablespoon brown sugar 1 teaspoon vinegar 1/2 cup catsup 2 teaspoons chili powder salt and pepper 1/2 teaspoon mustard (optional) Brown hamburger and onion. Drain out grease. Add the rest of the ingredients and simmer 15-20 minutes with lid.