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 and view the full Food safety at home video.