Hello Gasper,
I think you need to give a bird's eye view on basic requirement of ISO 22000 and after that you can list down separate questions for department like marketing, purchase, production, quality control, engineering and utility, maintenance, top management, stores, packing & dispatch, administration & training, research and development.
Once you are done with this manual activity, you can start consolidating all data at once place and prepare a final checklist. This process will definitely help you with internal audit for ISO 22000 of your Organization.