I came across this awesome way to cook a roast of beef. In this case, it was a 12 pound, 7 rib Standing Rib Roast. It was delicious! Start out at 500 degrees F and then turn the heat off for 2 hours and do not open the oven! That’s right. Leave the oven closed! Do not peek! Here is the recipe – CS Prime Rib. You will need Herb de Provence for this recipe and here is our recipe. You can adjust it to please yourself. Herb de Provence. Enjoy!