The chef at one of my locals does admit to using both chicken or beef stock as well as poultry seasoning . The seasoning that they use contains red pepper flakes , onion powder , salt , sage , celery seed , garlic powder , thyme , marjoram , tarragon , paprika , rosemary and mustard powder . I wouldn't suggest using too much poultry seasoning , otherwise the dish might be too " foul " . ;D