Barbecue Sauce - cooking recipe

Ingredients

1 medium onion, finely diced
butter
2 Tbsp. vinegar
2 Tbsp. brown sugar
1 c. ketchup
3 Tbsp. Worcestershire sauce
2 to 3 c. shredded meat or poultry (beef, pork, ham, chicken or turkey)
1 Tbsp. mustard
1 c. water
1/2 c. finely diced celery
salt
pepper

Preparation

Saute onion and celery in butter until transparent.
Add all other ingredients except meat or poultry.
Simmer 15 to 20 minutes.
Add meat and simmer until heated through.