Place the diced pork into a pan with half the olive oil, peppercorns and sage leaves and fry for 10-15 minutes or until golden brown and thoroughly cooked. Transfer to a plate lined with kitchen paper to absorb any remaining oil and fat. Wipe the pan clean with kitchen paper and add the remaining olive oil. Fry the onion for 5-7 minutes or until golden brown and soft. Add the mushrooms and fry for another 4-5 minutes (if the pan becomes dry add a little of the measured out cider). Stir in the cider and bring to the boil. Bubble for 2-3 minutes, then stir in the stock, cr?me fra?che, the mustards and the pork. Return to the boil and reduce by half. This should take between 10-15 minutes. NOTES : An easy-to-prepare midweek supper, thats made with Waitrose diced pork, which contains less than 5% fat. Serve it with boiled rice or jacket potatoes and fresh green vegetables.