How to Make It
Preheat oven to 400°F. Cut each squash in half lengthwise and remove seeds. Trim and discard ends, then cut each half crosswise into slices that are about 1 inch thick.
Place slices in a large bowl; add oil, chili powder, cumin, paprika, 1/2 tsp. salt and 1/4 tsp. pepper. Toss to coat. Arrange slices flat on 2 large baking sheets. Roast until lightly browned and tender, turning once, 35 to 40 minutes. Season with additional salt and pepper, if desired.