Winter lettuces are heartier than most everyday salad greens and have a pleasantly bitter flavor. They stand up well to crunchy walnuts and sweet-tart winter fruits.
Make the dressing: Gradually whisk oil into vinegar in a small bowl. Season with salt.
Make the salad: Toss chicories, walnuts, persimmons, and pomegranate seeds in a large bowl. Add vinaigrette, and toss to coat. Season with salt and pepper.