Lasagne di Radicchio

This is as lovely & bitter as radicchio itself, so you have to like the beautiful leaf to appreciate this lasagne. The radicchio you will use here is the raddicho di Treviso, which is long rather than round. They vary in size, so you’ll need between two & four for this weight. You’ll need a rectangular oven dish that’s about 35 × 24 cm (14 × 9½