Once the squash is peeled and cut up, this dish takes only minutes to assemble. If you are tight on time, buy the squash ready to cook – it is available peeled and cut up in many grocery store produce sections.
Preheat the oven to 425°F. Lightly oil a large shallow roasting pan.
Combine the squash and oil in a large bowl. Combine the coriander, cumin, allspice, salt and pepper in a separate bowl. Toss spice mixture with squash. Arrange squash on the prepared roasting pan in a single layer.
Roast squash, stirring occasionally, until tender and lightly browned in spots, about 23-25 minutes.