You got it!!!! So let's say you are serving at 6 pm. You can cook the roast for the first hour anytime you want. Then turn off the oven but don't open the door. Turn the oven on again around 5:15 pm and take out the roast 30-40 minutes later.

When I first got this recipe, I thought NO WAY!!!! Now it's the only way I prepare prime rib.