01 - Preheat oven to 300°F.
02 - Pat pork belly dry. In a small bowl, combine kosher salt, black pepper, smoked paprika, and garlic powder. Coat pork belly evenly with the spice mixture.
03 - Position pork belly on a rack in a roasting pan. Roast uncovered for 2 hours, basting halfway with pan drippings, until tender.
04 - While pork cooks, 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 reduced and syrupy, about 10 minutes. Set glaze aside.
05 - In a mixing bowl, combine red cabbage, green cabbage, grated carrot, mayonnaise, and apple cider vinegar. Season with salt and black pepper. Chill until ready to assemble.
06 - Remove pork belly from oven and increase temperature to 425°F. Brush pork belly generously with bourbon glaze. Return to oven and roast an additional 10–15 minutes until richly caramelized.
07 - Allow pork belly to rest for 10 minutes. Slice into 8 equal pieces.
08 - Lightly toast slider buns, brushing with unsalted butter if desired.
09 - Place one slice of pork belly onto each bun base. Drizzle with extra bourbon glaze and top with crisp slaw. Cover with bun tops and serve immediately.