Add sausage and sage and cook until browned. Pour over bread crumbs.
Add onion to pan, saute 2 minutes, and add apples, celery and salt. Cook 2 minutes and then add broth and parsley. Continue cooking until thoroughly heated.
Pour mixture over bread cubes and mix thoroughly.
Pour bread into greased 9- x 13-inch baking pan and bake in oven for 1 hour. If desired, pour over the stuffing some turkey pan drippings.