Prime rib cap off AAA or better on sale for $4.98/lb. Grabbed 3 two rib pieces to sous vide for steak and this 4.2 kg roast. People were crowded around the bunker - complaining about how much fat had been left on - while I searched for the fattiest, best marbled one.
Salted well, left uncovered in the downstairs fridge for a couple of days.
Oiled, salt, pepper, 200 F until 125 F. Tented with foil until everything organized - nuked hubbies slice til it stopped bleeding.