Gather all ingredients.

Preheat the oven to 375 degrees F (190 degrees C). Place a rack in a roasting pan.

Combine salt, pepper, and garlic powder in a small cup.

Place room-temperature roast on the rack in the roasting pan with the fatty side up and the rib side on the bottom. Rub the seasoning onto the roast.

Roast for 1 hour in the preheated oven. Turn the oven off and leave the roast inside for 3 hours, without opening the door.

Turn the oven back on to 375 degrees F (190 degrees C) and reheat the roast for 30 to 40 minutes. The internal temperature should be at least 145 degrees F (62 degrees C).

Remove from the oven and let rest for 10 minutes before carving.

Serve hot and enjoy!