Yankee lifestyle editor Amy Traverso got this recipe from her grandmother, Rose, who served it every Thanksgiving alongside the stuffing and sweet potatoes. It's a bit like having dessert for supper, but it's a nice counterpoint to a savory meal. You can also make it with squash purée.
Preheat your oven to 425° and set a rack in the middle position. Butter a 1-½-quart soufflé dish. Fill a kettle with about 4 cups water and bring to a simmer.
Meanwhile, in a large bowl, using a standing or handheld mixer, beat eggs and sugar at medium-high speed 2 minutes, until thick and pale yellow. Gently fold in remaining ingredients.
Pour the custard into the prepared dish and set into an 8-inch square baking pan. Transfer both to the oven; then fill the baking pan with enough of the simmering water to come up to the level of the custard. Bake 10 minutes. Reduce heat to 350° and bake until the center of the custard barely jiggles when shaken, 30-45 minutes longer. Let sit 10 minutes; then serve warm or at room temperature.