In Dahran. Saudi Arabia in the Seventies. I got back from work late and dropped in on the guys. They had decided to have roast beef for dinner. They had put a large piece of tenderloin in the oven, had a few drinks and passed out.
I opened the oven and waited for the smoke to clear.The joint was a lot smaller with a thick burned crust on it.
I cut off the burned parts, chopped up the sad remains, made some gravy, added a pack of frozen mixed vegetables. Put the whole lot in a pie crust and baked it. Not quite the roast beef that they had wanted but it wasn't too bad at all.