Butternut squash noodles are a great way to enjoy the flavors of fall. In this recipe, the butternut squash noodles are sautéed until tender and then tossed with a rich and nutty sage brown butter sauce. The sage brown butter sauce is made by melting butter in a pan until it turns golden brown and fragrant, then adding fresh sage leaves. Serve with some toasted walnuts and grated Parmesan for a comforting and seasonal dish.