Roast Chestnuts in the oven Place stuffing in a large pot. Sautee onions until very brown. The more onions, the better. Add to stuffing. Sautee celery and mushrooms. Add to stuffing. Breakup chestnuts. Add to stuffing. Add enough chicken stock to moisten stuffing and make a little mushy. Mix well. Put mixture in baking tin. Sprinkle with paprika for color. Bake in 325 oven 90 minutes or until firm