
This Korean bo ssam-style pork shoulder is slow-roasted until tender, then finished with a glossy brown sugar crust. Serve it with lettuce wraps, rice, kimchi, oysters, and bold sauces for a generous centerpiece meal.
Prepare the pork cure: mix the white sugar with 1/2 cup kosher salt in a bowl.
Pat the pork shoulder very dry, then rub the sugar-salt mixture all over the meat, pressing it into folds and crevices. Discard any cure that does not stick.
Place the pork in a glass or nonreactive baking dish, cover loosely with plastic wrap, and refrigerate for 24 to 36 hours.
Preheat the oven to 300°F (150°C) with a rack in the center.
Remove the pork from the refrigerator. Drain off the liquid from the dish or transfer the pork to a clean roasting pan. Do not rinse the pork.
Roast the pork uncovered for about 5 hours, spooning the pan juices over it once every hour, until the meat is deeply tender and pulls apart easily with two forks.
Remove the pork from the oven and let it rest for at least 10 minutes, or up to 1 hour loosely covered with foil.
Increase the oven temperature to 500°F (260°C).
Make the crust: stir the brown sugar with 1 tbsp kosher salt until evenly combined.
Spoon a little of the pan juice over the pork to moisten the surface, then press the brown sugar mixture over the top and sides of the roast in an even layer.
Return the pork to the oven for 8 to 10 minutes, watching closely after 5 minutes, until the sugar bubbles and forms a deep caramelized crust. Shield any darkening spots with foil if needed.
Transfer the pork to a serving platter. Do not use the pan juices as a sauce, as they will be very salty.
Make the ginger-scallion sauce: combine the scallions, ginger, canola oil, soy sauce, and sherry vinegar. Let stand for 20 minutes so the aromatics soften.
Make the ssam sauce: stir together the ssamjang, gochujang, and water until smooth. If it separates as it sits, stir again before serving.
Arrange the pork with lettuce leaves, cooked rice, kimchi, oysters, ginger-scallion sauce, and ssam sauce.
To serve, pull the pork into pieces at the table. Fill a lettuce leaf with rice, pork, kimchi, an oyster if using, ginger-scallion sauce, and a small spoonful of ssam sauce, then fold and eat by hand.
For best texture, use pork butt or shoulder with good marbling; lean pork will dry out during the long roast. Start the cure the day before cooking, and avoid rinsing the pork or the seasoning will be diluted. Oysters are traditional for this style of bo ssam but can be omitted for a simpler pork-and-lettuce wrap. Leftover pork keeps well for 3 to 4 days refrigerated; reheat gently and add fresh lettuce, rice, and kimchi when serving.
