Winter Squash Gratin

Substantial and aromatic with the irresistible smell of melting cheese, this homey gratin can serve as the main part of a meal for four. The squash is settled on a bed of browned onions covered with cheese and then with soaked bread. The bread looks rather unappetizing at first, but it forms a protective crust and keeps the squash from drying out. In the end it turns brown and crisp.

Even when baked in an oven set as low as 300°F, the milk will probably separate, but by the time the