Preheat the oven to 200C/400F/Gas 6.
Rub the oil over the pork and season with salt and freshly ground black pepper.
Heat an ovenproof griddle pan and griddle the pork for a few minutes on both sides, then transfer to the oven and cook for 8-10 minutes, or until golden-brown and completely cooked through.
For the caramelised apple, place the butter, sugar and apple slices into a pan over a medium heat and cook gently for five minutes, or until softened and golden-brown.
For the creamed leeks, heat the oil in a frying pan and cook the onion and leek over a low heat for five minutes.
Add the cream and cheese and simmer gently for 3-4 minutes.
To serve, place the pork onto a plate with the caramelised apple and creamed leeks spooned alongside.
Type the ingredients you want to use, then click Go. For better results you can use quotation marks around phrases (e.g. "chicken breast"). Alternatively you can search by chef, programme, cuisine, diet, or dish (e.g. Lasagne).