Quesdillas - not sure about spelling, do it with all the left over beef
I was going to suggest
Oh yum... I wasn't even thinking about salad. That's how I usually use leftover grilled steak, but this prime rib is more like roast beef. However, some nice thin slices of warm prime rib with maybe a horseradish ranch dressing on the salad... My mouth is watering just typing this. Thanks!
Now I just have to invite a friend over to share it with me. DH is out of town and I can't eat the whole thing by myself. Too bad you're on the other side of the country, MM... :-)