1 lb. ground beef
1/2 c. onion
1 (8 oz.) can tomato sauce
1 tsp. chili powder
1 tsp. prepared mustard
1 tsp. Worcestershire sauce
8 hamburger buns
1 (4 oz.) pkg. shredded cheddar cheese

Fry hamburger until brown; drain. Add rest of ingredients. Bring to boil, then simmer for 5 minutes. Top each bun with cheese.