I’ve got to tell the story of this dish because it’s delightful.

For my first feast at Dark Skies, the little country group with extremely young participants, somebody’s mother donated a pot of potato soup to the event.

We thanked them profusely for the contribution, and then thought how to make this a bit period. “Fabulous Feasts” talked about coloured foods in feasts. Forme of Cury does a dish called “lete lardes” where you stack up layers of coloured curds, slice it crossways and get something like fried bacon in rainbow colours.

In this case, we squirted some blue food colouring into the soup, and made blue soup.

The Dark Skies hall was a little rural affair, with an ancient open fire and a tiny kitchen. It had a stove, which mostly worked, it had a powerpoint you could plug a frypan into, and it had a toaster.

I came up with the idea of putting regular white bread through the toaster, then getting one of the kids to cut out fish shapes with a pair of scissors.

So we had blue soup with fish croutons. Excellent fun, and it tasted OK.

I did a more period version, based on white beans, for the Misrule feast of 2010.