Pre-cooked prime rib question
I received, as a gift, a very large pre-cooked prime rib from one of our vendors. Since it is from a restaurant supply, there are no instructions as to heating. It is supposedly cooked to a rare state. While I have cooked my own prime rib, I have no idea how to reheat and not overcook this big puppy! It is in a very heavy plastic with lots of juice in the bag. I know I could cut large steaks and put them on the grill but would like to try to reheat as a whole, lots of family coming.
I have come back out of lurkdom, knowing someone on this forum will probably have a few ideas.
Thank you in advance,