How to Roast Frozen Butternut Squash

Heat the oven and baking sheet to 450°F. Arrange a rack in the lowest oven position and heat the oven to 450°F. Place a rimmed baking sheet in the oven to heat.

Season the squash. Place the squash in a medium bowl, breaking up any pieces that are frozen together. Add the olive oil, salt, and several grinds black pepper, and toss until the squash pieces are evenly coated.

Transfer the squash to the hot baking sheet. Remove the heated baking sheet from the oven and carefully pour the squash onto it. Arrange the squash in an even layer (this prevents it from steaming).

Roast the squash 18 to 20 minutes. Roast until squash is tender and crispy in places, gently stirring halfway through to ensure even cooking, 18 to 20 minutes total.