It’s layered with toothsome nutty black rice, juicy-crisp radicchio leaves, and spice-roasted delicata squash rings. Delicata squash is a winter squash that is often bypassed for the ubiquitous butternut squash. If you need any further encouragement to make this salad, note that it can be easily prepped ahead of serving, since the rice and squash rings should be cooked and cooled to room temperature. Arrange the squash rings on a rimmed baking sheet lined with parchment. Arrange the delicata rings around the salad, tucking some of the rings under the radicchio leaves.