1) Preheat the oven to 170°C
2) Slice the potatoes very finely, using a potato peeler (or mandolin) to get uber thin strips.
3) Place the potato slices or strips into a bowl, add the duck fat, garlic and oregano, and season generously with sea salt and freshly cracked pepper. Use your hands or a spoon to combine the ingredients gently but well, coating the potato slices.
4) Arrange the potatoes loosely in a baking dish.
5) Cook for approximately 20-30 minutes or until golden and crisp.
6) Finish with another pinch of salt and finely chopped parsley.
Serves 4.