Slow-Roasted Prime Rib

1. 1

   Take the beef out of the refrigerator 2 hours before cooking so it can come to room temperature.

2. 2

   After 30 minutes, season the meat on all sides with the fleur de sel and pepper.

3. 3

   Position a rack in the center of the oven and heat oven to 325F.

4. 4

   Turn on the exhaust fan.

5. 5

   Heat a 12-inch skillet over high heat for 1 minute.

6. 6

   Swirl in the olive oil and, when the oil puts off its first wisp of smoke, put the beef in the pan and sear it on all the outer sides (not the cut sides) until well-browned, 6 to 8 minutes total.

7. 7

   Use a set of tongs to flip the beef; be careful of splattering oil.

8. 8

   With two sets of tongs, transfer the beef, bone side down, to a roasting rack set in a small roasting pan.

9. 9

   Arrange the rosemary, thyme, garlic, and butter evenly on top.

10. 10

    Roast the beef, basting every 30 minutes with a bulb baster, until a thermometer inserted into the center reads 120F to 125F for rare, about 2 hours.

11. 11

    Or cook to 130F to 135F for medium rare, about 2 1/4 hours.

12. 12

    Or cook to 140F to 145F for medium, about 2 1/2 hours.

13. 13

    Let the meat rest for at least 15 minutes before carving.

* Per serving · 4 servings · Values may vary.