This recipe seems elaborate, but it was actually the result of a bunch of leftovers from other recipes. The pork butt was purchased for porchetta (at work), the dashi, pork skin jus & Japanese mustard greens for pork ramen (at my leisure). Looking at these ingredients, I decided to give a classic Philly sandwich a try: roast pork & bitter greens on a seeded roll. The flavor profile has shifted East and the provolone has been omitted in favor of a slightly richer, more flavorful gravy for the pork but this is otherwise pretty straightforward. Totally satisfying lunch.
N.B. The pork skin jus is an adaptation from The Art of Living According to Joe Beef: A Cookbook of Sorts. For my money, it was the best cookbook released in 2011 and it has been a great source of inspiration in the kitchen.