Marie'S Barbecue Sauce - cooking recipe

Ingredients

1 (8 oz.) can tomato sauce
1/2 c. catsup
1/2 c. vinegar
1/2 c. brown sugar
1/2 c. water
1 Tbsp. Worcestershire sauce
1 Tbsp. ground mustard
1 Tbsp. cornstarch
1 Tbsp. onion, chopped

Preparation

Simmer all ingredients.
Use for a good size roast in oven until flakes easily work fork (3 hours?).
Flake.