Sweet and Sour Meat Loaf

This is my great grandmother's homemade recipe.

1 pound ground beef
1 cup bread crumbs
Salt and pepper
1 onion, cut small
1 egg
1 teaspoon Worcestershire sauce

Mix all together place in pan.

Cook sauce for 15 minutes till thick (thicken with cornstarch).

Bake at 325 degrees F for 30 minutes, then pour sauce over top of meat loaf and bake for 1 hour.

Sauce
2/3 cup vinegar
2/3 cup ketchup
1 cup granulated sugar
1 cup water