Pre-heat your oven. I set mine to 230C, which is the hottest possible temperature
Peel the potatoes and cut them lengthwise into fingers, around 1/2 cm thick. Put them in a bowl of cold water to keep fresh
Heat a pan of water to a rolling boil and add the potatoes
Cook for three minutes then drain and put to one side to dry out a little
Put the oil, salt and pepper into the pan you've used to cook the potatoes and add the chips back to the pan
Put the lid on the pan and shake gently to coat all the chips
Tip the chips onto a baking sheet and spread out so they have as much space as possible
Put in the oven and cook for 15-20 minutes, turning 2 or 3 times so the chips are browned on all sides.
While the chips are cooking grate the Parmesan
Remove from the oven and drain the excess fat off on kitchen paper or a clean tea towel
Put the oven chips in a serving bowl and check the seasoning, adding more salt and pepper if necessary
Drizzle over the truffle oil and top with the grated Parmesan cheese.
Enjoy!