Raleigh-Durham Pork Barbecue recipe

This was a great recipe both the meat and the mustard sauce. I cooked a 4 lb. pork shoulder per the recipe for 7-8 hours in my crock pot and it was done perfectly. For other reviewers bickering over low and slow, cooking time etc. here is a tip. I also smoke meats as well when it comes to pork shoulders, the key is the temperature of the meat. While sounding way overdone temp-wise, the key to fatty cuts like pork shoulder is cooking the meat slowly until it reaches an internal temperature of 195-200 F. At that temperature, the collagen breaks down and makes the meat tender and moist. Great looking recipe. It is in the crock pot as I type this. One question. What kind of bread is that in the picture? Just trying to make my sandwich look as nice as yours. Thanks.