Bake cornbread and rolls. Cool. I often bake these a day or so ahead of time.
In a separate bowl, skin and debone chicken and cut into bite sized pieces. Set aside.
In a large bowl, crumble together: cornbread and rolls. Season with sage, salt and pepper.
Saute onion and celery with butter in skillet until softened.
Mix together in a separate bowl: soup, chicken broth, egg, melted butter, onion and celery.
Combine: chicken, dry ingredients and liquid ingredients together. Add more chicken broth, if needed. Dressing should have a really moist texture.
Add to a greased 9 x 12 baking dish and bake in a preheated 350 degree oven until golden brown--about 35-40 minutes.
*** You can make a day ahead of time and keep covered and refrigerated until you bake it.