Bring vinegar, ketchup, mustard, brown sugar, molasses, hot sauce, black pepper, and salt to a simmer in saucepan over medium heat. Cook 5 minutes. Transfer 1 cup sauce to bowl, and set aside. Add seitan to saucepan, and cook 10 minutes. Divide among buns. Serve with pickle chips, coleslaw, and extra sauce, if using.
|