1Let prime rib set out at least an hour before preparing. Rub the prime rib down with oil. Then, mix all the seasonings together and coat the prime rib with them.
2Next, place in oven at 400 degrees to sear the outside crust for 20 to 30 min. Take it out and put in roaster or keep in oven and drop temp. down to 275- 300 degrees. Three or four hours to cook. Internal temp. should be 125 to 135 for medium rare.