Rub the pork roast with the olive oil, then season well with the salt and pepper on all sides. Heat a large skillet over medium-high heat and sear the pork roast on all sides, about 3 minutes per side, until browned. This step is optional.
4-6 pounds pork shoulder butt roast, 2 Tablespoons olive oil, 1 Tablespoon kosher salt, 1 Tablespoon freshly ground black pepper
Transfer the seared pork roast to the slow cooker, then combine all the onion, garlic, canned tomatoes, ginger, fish sauce, chili garlic sauce, spicy brown mustard, and brown sugar in a medium bowl. Stir well, then pour over the seared pork roast.
1 onion, 6 garlic cloves, 14.5 ounces crushed or diced tomatoes, 2 Tablespoons fresh ginger, 1/4 cup fish sauce, 3 Tablespoons chili garlic sauce, 1 Tablespoon spicy brown mustard, 1/4 cup dark brown sugar
Cook on low heat for 6-8 hours, until the meat shreds easily with a fork.
Serve on sandwich or slider buns, sliced in half horizontally, topped with Asian coleslaw and cilantro.
Soft buns, Asian coleslaw, Cilantro