When in South Carolina a couple of times I was introduced to the extraordinarily yummy mustard-based BBQ sauce there. This recipe for sauce is dang easy and comes pretty close to what I tasted there. It's best with pulled pork, but I imagine you could use it anywhere you'd use BBQ sauce.

2/3 c. dijon mustard
1/2 c. brown sugar
1/2 c. white vinegar
1/4 c. water
1 T soy sauce
1 t garlic powder
1/2 t hot pepper sauce

Combine all ingredients in a medium saucepan, stir, and bring to a boil. Reduce heat and simmer 5-10 minutes, stirring occasionally.