Amy's Barbeque Sauce

1 med. onion, finely chopped
2 Tbsp butter
2 Tbsp white vinegar
2 Tbsp brown sugar
1/4 c. lemon juice
1 c. ketchup
2 Tbsp worcestirshire sauce
1/2 tsp+ a little more yellow mustard
1/2 c. chopped parsley
1/2 c. water.

Cook onion in butter until wilted. Add remaining ingredients, simmer for 30 minutes.

Great to use with chicken cooked on the grill. Clean chicken, marinade in 1/2- 3/4 sauce, reserving some to coat chicken as it cooks or after it is done cooking.