In a skillet saute onions in a little oil. Add 1 family size bottle of ketchup (24 ounces). Add:

1 bottle water
3 tbsp. brown sugar
3 tbsp. wine vinegar
3 tbsp. Worcestershire sauce

Bring to a boil, stirring frequently for 10 minutes. This may be used for baking chicken, a roast pork and beef also spare ribs. This sauce may also be frozen and used at a later date.