This version of the traditional south carolina mustard barbecue sauce is jazzed up yellow mustard with some hot sauce, ketchup, and brown sugar or honey. Add extra honey or brown sugar (or a combination) if you like a sweeter sauce, and feel free to spice it up with some minced hot peppers. Serve this mustard barbecue sauce it with your south carolina-style pork barbecue or grilled pork or ham. Or use it as a spread for corned beef or ham sandwiches. It also makes a fabulous dip for fried chicken strips or nuggets. The recipe is easily doubled for a crowd.