Sweet and Sour Meatballs

Meatballs:
1 egg, lightly beaten
1/2 cup soft breadcrumbs
1/4 cup milk
1/3 cup finely chopped onion
1 tsp salt
1/2 tsp Worchestershire sauce
1 pound ground beef

Sauce:
1/2 cup ketchup
1/3 cup sugar
1/3 cup vinegar
1 tbsp Worchestershire sauce

Combine sauce ingredients. Pour over meatballs.
Bake, uncovered, at 350 degrees F. for 45 to 60 minutes, until meatballs are cooked through. Stir occasionally.
Remove from the oven and transfer to a serving dish. Serve immediately.