By Mayo Clinic Staff. Yellow tongue â a yellow discoloration of your tongue â is usually a temporary, harmless problem. Most often, yellow tongue is an early sign of a disorder known as black hairy tongue. Rarely, yellow tongue may be a sign of jaundice, a yellowing of the eyes and skin, which sometimes indicates liver or gallbladder problems.
Grab a shallow pan and place the prime rib in it with the bone side facing down. Roast it at 450 degrees F for 15 minutes to sear the outside, and then turn the oven down to 350 degrees F. Continue roasting the prime rib for 45 to 90 minutes, depending on how done you like your meat. Check it by inserting an instant-read thermometer in the meatiest part of the roast.
1 *NOTE* if desired you can cover the roast loosely with foil the first hour and then uncover and cook for the remaining time. --------------------------------------------. 2  APPROXIMATE COOKING TIMES for the prime rib cooked at 350Â°F after the 20 minute cooking time at 450Â°F.3  Rare; cook 12-13 minutes per pound or to 130Â°F. Rare; cook 12-13 minutes per pound or to 130Â°F. 2  Medium-rare; cook 14-16 minutes per pound or to 140Â°F (I would not recommend cooking a prime rib any more than medium-rare). 3  Since every oven cooks differently cooking times are only approximate.