Tangy Meatballs

1 c. ketchup
2 t. mustard
1/2 c. water
2 T. finely diced onion
1 clove garlic
1 T. Worcestershire sauce
1/4 c. brown sugar
Salt and pepper

Mix ingredients, then add frozen meatballs.
Cook in crock pot on low for 4 hours.
Serve over rice.