My sister J had joked that she had been eating cardboard in an attempt to lose weight. Now that I saw her again in the flesh, she admitted that her new slim form was thanks to a recipe for offal made in a special French food processor.

‘You just whiz up the liver and kidneys in the machine, which also cooks the meat. Then you have it all for breakfast. It’s so filling that you don’t need to eat again for the rest of the day’.

I wasn’t that desperate to drop a few pounds.