Salsify and anchovy gratin with oysters

Salsify is occasionally called ‘oyster plant’, so it seemed fitting to pair it with oysters. If you’re not a fishy person and want this to be oyster- and anchovy-free, then add more Parmesan and salt. Salsify usually come covered in the fine dirt in which they have been grown. You need to wash this off first, and then quickly peel them – a regular potato peeler is all you need, but, as they discolour quickly, have a pot with acidulated water ready.

Do wear gloves, as the salsify see