In stockpot, add butter, chopped onion, celery and carrots, and allow to 'sweat', until onions are translucent.
Add garlic, Italian seasoning, parsley, salt and pepper and stir well.
Add shredded chicken, stock and water and cover with lid.
Allow to simmer for at least 30 minutes.
In the meantime, slice the head of cabbage in half, and slicing similar to an onion, create 'ribbons'. Add these to the pot and stir well. If needed, add a bit more liquid to cover.
As cabbage cooks, taste and adjust salt, as this will absorb a lot of the seasoning. Serve hot and enjoy!