This classic Thanksgiving dressing, made with bread, celery, onions, apples, chestnuts, thyme and sage, is relatively simple to execute. It would do well at almost any time of the year as an accompaniment to roast chicken or pork. The copious use of turkey broth, or a good chicken broth, is crucial to help meld the flavors together. Also necessary is an understanding that the cooking should last long enough to crisp the exterior without burning it, while not going on so long as to dry out…