Roughly chop your leeks and celery stalks. There are two stages to this recipe, one for the leeks another for the celery as the latter joins the pot a little later.
Sauté your leeks in a olive oil, remove from the pan and then add your pork to brown. Put the leeks back in with the pork and add enough warm water to cover. Bring to the boil and then let it simmer for approximately 40 minutes.
In another pot, blanch your celery, drain and set aside. Add the celery in once you have checked the pork is soft and almost cooked. Let it cook for another 15 minutes.