1.
Allow beef rib to stand at room temperature for at least 1 hour.
2.
Preheat the oven to 190 C / Gas 5. Combine the salt, pepper and garlic granules in a small cup. Place the beef rib on a rack in a roasting tin so that the fatty side is up and the rib side is on the bottom. Rub the seasoning into the beef.
3.
Roast for 1 hour in the preheated oven. Turn the oven off and leave the beef inside. Do not open the door. Leave it in there for 3 hours. 30 to 40 minutes before serving, turn the oven back on at 190 C / Gas 5 to reheat the roast. The internal temperature should be at least 62 degrees C. Remove from the oven and let rest for 10 minutes before carving into servings.