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Turn Off the Oven and Wait for 2 Hours
Perfectly Medium-Rare Prime Rib of Beef
Prime Rib Photo (c) John Mitzewich
The oven is turned off, and you wait exactly 2 hours without opening the oven door. DO NOT OPEN THE DOOR. Go for a walk, or get the side dishes cooked on top of the stove.
During this two-hour period the heat from the initial searing will continue to slowly cook the beef to a perfect medium-rare.