- 1 skinless, bone-in pork shoulder (Boston butt; 5—6 lb.)
- Kosher salt and freshly ground black pepper
- 1/2 cup Dijon mustard
- 1/4 cup finely chopped fresh sage
- 2 Tbsp. finely chopped fresh marjoram
- 4 garlic cloves, finely chopped
- Place a rack in lower third of oven; preheat to 325°.
- Season pork with salt and pepper.
- Mix mustard, sage, marjoram, and garlic in a small bowl.
- Spread all over pork, working it into all the crevices.
- Place pork, fat side up, on a rack set inside a roasting pan and roast, basting with pan juices about every hour and tenting with foil if pork browns too quickly, until pork is well browned and very tender, 5—6 hours (depending on size of pork shoulder).
- Let pork rest at least 10 minutes before serving (the meat should pull apart easily).
- Serve over a bed of soft polenta for catching the juices, with a simply dressed salad on the side.