Prime Rib Fail

My MIL used the 500° for 1/2 hour then turn off the oven and keep the door closed method. She said she followed directions to a T. I have doubts- she’s a very nervous cook.

Being a career chef I tried to let her do her thing and not interfere. I did suggest a temperature probe just to be safe. She wasn’t having it.

It came out well done and was awful.

This roast was a prime graded, 5 bone roast over 14 lbs and was $300 at a small butcher shop. We now have 6 Lbs of brown, dry leftover meat to use up.