01 - Preheat oven to 300°F.
02 - Pat the pork belly dry. Mix kosher salt, black pepper, smoked paprika, and garlic powder. Rub seasoning evenly over the pork belly.
03 - Place pork belly on a rack in a roasting pan. Roast uncovered for 2 hours until tender, basting halfway with pan juices.
04 - Combine bourbon, brown sugar, soy sauce, apple cider vinegar, Dijon mustard, honey, minced garlic, and chili flakes in a saucepan. Simmer over medium heat until syrupy, about 10 minutes. Set aside.
05 - Mix red and green cabbage, grated carrot, mayonnaise, and apple cider vinegar in a bowl. Season with salt and pepper, toss well, and refrigerate until serving.
06 - Remove pork belly from oven. Increase oven temperature to 425°F. Brush pork generously with bourbon glaze. Return to oven for 10 to 15 minutes until the surface caramelizes.
07 - Let pork belly rest for 10 minutes on a cutting board. Slice into 8 even pieces.
08 - Lightly toast slider buns. Optionally, brush cut sides with melted unsalted butter.
09 - Place a slice of glazed pork belly on each bottom bun. Drizzle with additional glaze, top with slaw, and cap with bun tops. Serve at once.