1. Preheat oven to 275F. On the underside of the rib, remove the thin membrane and discard. Season both sides with salt and pepper.
2. Place the ribs in a roasting pan, cover with double thickness of tin foil.
3. Roast for 4 hours or so. Discard foil. Use a wide, flat spatula to carefully lift the ribs onto a baking sheet. Spread the sweet chili sauce generously over the ribs.
4. Place oven rack near the top of the oven. Turn broiler on and broil the ribs for 3-5 minutes, or until the sweet chili sauce begins to caramelize. Make sure you don't burn the sauce, so keep a close eye on the ribs.