Sweet and Sour Meatloaf

1 1/2 pound ground beef
2 cups bread crumbs or oats
1 medium onion, chopped or use some minced onion or onion powder
1 1/2 teaspoon salt
1/4 teaspoon pepper
4 oz tomato sauce or ketchup
1 egg, beaten
 

Preheat oven to 350. Lightly mix all ingredients except the sweet and sour sauce. 
Form into a loaf and bake in a shallow pan for 30 minutes.

Mix up the sauce:

4 oz. Tomato sauce or ketchup
2 tablespoons mustard
2 tablespoons brown sugar 
2 tablespoon vinegar
½ cup water

Pour sauce on meatloaf and bake an additional 15 minutes. 

Variations:
If you like your meatloaf extra juicy, you can make a little more of the sweet and sour sauce add that to your meatloaf. 
Just mix these things to the mixture BEFORE you bake it, then follow the directions above.