Heat the oil in a large soup pot.
Add the leek and celery and cook for 5 minutes until slightly softened.
Add the tomato paste, salt and pepper and stir through for a minute or two.
Add the carrots, zucchini, cabbage, Tuscan cabbage and stock. Stir well to combine. Add the parmesan rind and bring to the boil. Once boiling, turn the heat down, cover and simmer for 90 minutes (or up to 2 ½ hours for a richer flavour)
Add the chickpeas and cook for an extra 20 minutes. Season once again with salt and pepper, to taste.
Serve with grated parmesan.