Combine marinade ingredients in a shallow baking dish. Add pork, tightly cover dish and marinade for 2 hours flipping every half hour.

Preheat oven to 300. Remove pork from dish and any brush off excess marinade. Transfer to a roasting pan and roast for 1 hour 45 minutes or until pork is tender.

Transfer marinade to a medium pot and simmer to reduce liquid until it thickens slightly – about 15 minutes. Add or remove liquid / water to adjust if needed. Use a fine mesh strainer to remove solids from marinade.

Remove pork from oven and allow to cool for 20 minutes. Cut 1/4 inch slices and transfer to marinade. Allow to simmer on low for 5-10 minutes.

Serve pork on Banh Mi and drizzle marinade over pork.