Chèvre and Pumpkin Lasagna

In Italy, pumpkin is thought of as a vegetable. Instead of loading it up with sugar and cinnamon, Italians invigorate it with garlic and cheese, and if it is sweetened at all, the sugar derives naturally from an addition of caramelized onions or roasted leeks. That is the charm of this easy and elegant lasagna, in which leaves of pasta are layered with creamy, cheesy pumpkin custard, a rich and tangy relish of sautéed onions, and nubbins of fresh goat cheese. Serve it as a luxurious first c