Poke small slits into pork. Cover generously with the Hawaiian sea salt and liquid smoke, using your hands to rub it all over the pork surface.
Gently wash the banana leaves with a wet cloth. Arrange the pork in a pile in the center of the banana leaves, folding in the corner and edges to encase the pork. Carefully flip over and set the seam side down on a second banana leaf.
Place the leaf wrapped pork into a Dutch oven and cover with water or stock. Cover the pot and transfer to oven. Cook for 3 hours, until it’s tender.
Transfer pork to a cutting board or plate and shred. Place shredded pork on a bun topped with slaw and BBQ sauce.