Stanislaus County, California. Stanislaus County (/ËstÃ¦náµ»slÉËs/ or /ËstÃ¦náµ»slÉË/) is a county located in the Central Valley of the U.S. state of California. As of the 2010 census, the population was 514,453. The county seat is Modesto. Stanislaus County comprises the Modesto Metropolitan Statistical Area.
Sear the rib roast (prime rib) for 15 minutes at the higher oven temperature (450 degrees F.), then turn the oven to the lower temperature (325 degrees F.) for the rest of the cooking time. Every 1/2 hour, baste the cut ends of the roast with the fat accumulated in the roasting pan. Do Not Cover the roast.he internal temperature will rise to 125 degrees F. to 130 degrees F. (medium rare) in approximately 15 to 20 minutes. If allowed to rest as long as an hour, the internal temperature will rise even higher. So, pay attention to how long you let the cooked prime rib roast sit.
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.