"You can start a day or two beforehand on the dishes that will complete your holiday menu: Slice squash up to a day ahead; refrigerate in a resealable plastic bag. Once cooked, squash can sit at room temperature, covered, for up to two hours...."
INGREDIENTS
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Vegetable oil, for baking sheets
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3 acorn squashes (about 1 1/2 pounds each), halved, seeded, and sliced into 1-inch-thick crescents