Sloppy Joes - cooking recipe

Ingredients

1 lb. lean ground beef
1 onion, diced
1/2 c. ketchup
2 Tbsp. chili sauce
1 tsp. prepared mustard
1 tsp. cider vinegar
1 tsp. sugar
6 whole wheat hamburger buns

Preparation

Brown meat and onion in a large skillet over medium-high heat; pour off fat.
Add all other ingredients, except buns, mixing well.
Reduce heat and simmer 20 to 30 minutes, uncovered.