Heat the oil in a non-stick frying pan. Add the pork and fry for a few minutes on either side until golden brown. Remove from the pan and keep warm.
Add the apple slices to the pan and cook for a couple of minutes until browned. Remove from the pan.
Add the shallots and sage to the pan, adding a little more oil if necessary, and cook for several minutes until softened. Then add the cider and return the pork and apples. Simmer gently for about 5 minutes or until the pork is cooked.
Remove the pork and apples using a slotted spoon and place in a warm serving dish. Stir the Philly into the cider mixture in the pan and heat until melted. Season to taste and immediately pour over the pork and apples. Serve with a green vegetable of your choice.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home.