Sprinkle chicken with salt, pepper and paprika. Brown in half the butter and remove to large shallow baking dish. (You may need 2 dishes.) Add remaining butter to drippings and sauté mushrooms until tender. Sprinkle flour over mushrooms and stir in broth, sherry and rosemary. Cook until slightly thickened and pour over chicken. Cover and bake at 350 degrees for 45 minutes. Serve with buttered seasoned noodles. Serves 18 people. This is an easy company dish for a crowd.