Acorn squash skins are quite leathery and the cooked flesh will pop out of it as you cut the wedges. Use a butter knife to help separate the skin and flesh if needed. This combo of winter squash, hearty wheat berries, toasted walnuts and blue cheese is the essence of fall. Soaking the wheat berries overnight is smart trick to help slash the cooking time in half. It’s the same principle as soaking dried beans.