here is a recipe for a mustard sauce that I found, made and all I can say is it knocked my socks off!!!!!
(this was copied from another source and I am not the owner.)
My favorite sauce to add to pulled pork is a mustard vinager sauce. I add just a bit, maybe 1/2 a cup, to moisten the meat and add a bit of flavour after its been pulled.
When making a Sammich I add some more of the sauce with a shake or two of the rub I used to season the butt. To my taste this sauce is a perfect match with cole slaw and I dont be eatin me no pulled pork sammich without the slaw.
I dont hear any one mention using this sauce but I find it is the tastiest addition to pulled pork. From what I've read most of ya'll are stuck in north carolina, now theres nothing wrong with vinegar or piedmont sauce, I just find this sauce has more flavor and makes better pairing with pork butt.
Mustard Vinegar Sauce
1 cup apple cider vinegar
1/2 cup Yellow mustard
1/4 cup onion finely minced
2 cloves garlic pureed
1/2 teaspoon black pepper
1 tablespoon Worcestershire sauce
1/2 cup brown sugar
1/4 teaspoon cayenne pepper
1/2 teaspoon salt
1/2 teaspoon Tabasco sauce
Combine ingredients and simmer for 15 minutes, stirring occasionally.
For a smoother sauce, blend on high for a few minutes.