Pre-heat the oven to 180°C (fan)/200°C/400°F/gas mark 6.
Wash the potatoes. Place on a chopping board and very carefully slice thin slices (about 5mm thick or even thinner if you can) taking care not to go all the way through to the chopping board. Placing two wooden spoon handles or two chop sticks on either side of the potato will help here.
Put the prepared potatoes on a non-stick or lightly greased baking tray. Brush liberally with olive oil (this will help your skins to go nice and crispy).
Bake in the oven for 40 minutes to an hour or until cooked through. Serve with butter and some finely chopped parsley.
Notes
Nutritional information is approximate and is intended as a guide only.