1 c. vinegar
1 c. ketchup
1 c. water
1/2 c. mustard
1/4 c. Worcestershire sauce
2 tbsp. brown sugar
1/2 tsp. cayenne pepper (mild or 1 tsp. for hot)

Blend all ingredients in a saucepan and simmer for 30 minutes (you may have to use a whisk to break up the mustard). Take 1/2 to the grill for basting and 1/2 for table sauce. Sear meat then baste continually until done. Most meat takes 45 minutes on medium low heat on a gas grill. There's little sugar and no oil in this sauce to reduce flare ups.