Tuna & Buckwheat-Pasta Gratin

This is a riff on the classic tuna-noodle casserole (which I grew up on and adore), but it incorporates an earthy and substantial buckwheat pasta from northern Italy known as pizzoccheri. Because of buckwheat’s relatively low gluten content, you have to be quite thorough and firm in kneading to get a cohesive dough that rolls out smoothly. A buckwheat noodle will always have a more substantial and hardy texture, which I love, but it’s not for everybody. This is a beautiful wintery, Alpine p