Heat half of the oil in a deep frying pan or hob proof casserole dish.
Fry the pork over medium heat in batches and set aside.
Add extra oil to the pan with a little of the butter and fry half the leeks with a pinch of salt until tender.
Add the garlic and then add the flour
Pour in the cider a little at a time, picking up any bits at the bottom of the pan.
Add the stock, bay leaves and pork then simmer half covered with a lid for 1-1.5 hours until the meat is just tender.
Heat the oven to 200C/180C fan.
Simmer uncovered for a few minutes to reduce the sauce if it looks like there is too much liquid.stir in remaining leeks, parsley and cream and season well.
Peel all the potatoes and slice
Place Potatoes on top and put bits of butter over the top and bake for 1-1.5 hours
Allow to rest for 10 minutes when it comes out the oven
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