Season prime rib with kosher salt, black pepper and sweet BBQ rub.
Set smoker temperature to 225˚F. Recommended wood flavors: hickory, apple, or pecan.
Smoke prime rib at 225˚F for 4 hours or until internal temp is 120-125˚F.
Once internal reaches 120-125˚F, pull the prime rib off the grill and allow to rest for 30 minutes (unwrapped).
Mix together ingredients for Come Back Sauce. Place sauce in the refrigerator to chill.
Slice prime rib in between each bone into 7 Tomahawk steaks. Generously season both sides of each steak.
Set grill temperature to 500-600˚F and place each steak directly on the grill for 2-3 minutes per side or until desired internal temp is reached.
Remove each steak from the grill and serve with chilled Come Back Sauce.