Barbecue Sauce

"This is the perfect barbecue sauce. Make this and put it on anything. It makes a whole saucepan full and will keep in your fridge for a long time."
-Hilary Western

Ingredients:
1 C chopped onion
2 C vinegar
2 tsp garlic salt
1 tsp pepper
1/4 C flour or Cornstarch
1/2 C cold water
1 qt ketchup
1/2 C oil
4 C brown sugar
3/4 C Worcestershire sauce
2 tsp dry mustard (not mandatory)

Directions:
Put onions and vinegar in blender. After blending, combine with all other ingredients in a large saucepan. Simmer for one hour.