Heat the oven to 160C/140C fan/gas 3. Toss the pork in the flour with some seasoning. Heat the oil in an ovenproof casserole dish and fry the pork for 10 mins until golden, then transfer to a plate. Tip all the veg into the pan with the rosemary, bay leaves and garlic, and cook on a low heat for 10 mins until softened. Stir in the tomato purée and cook for a minute, then add the wine. Pour over the stock, then bring to a simmer and stir in the fried pork.

Cover, then cook in the oven for 1 hr. Remove from the oven, stir through the beans, cover again and return to the oven for 30 mins, or until the pork is very tender. Leave to cool a little, then scatter over the parsley, lemon zest and reserved celery leaves.