You will need:
Good couple of handfuls of sea salt (I used unbleached sea salt)
Sprig of rosemary, leaves chopped finely
zest of 4 lemons
4 large potatoes, finely chopped into matchsticks
large pan or chip pan with sunflower oil
Place all the ingredients in a pestle and mortor and grind together for as long as it takes for the salt to take on a slightly yellow hue; you should be able to smell the lemon oils as they are released too.
Next take your matchstick potatoes and drop them into the hot oil for about 5 minutes, or until they are just turning golden. Remove from the heat and let them sit for another five minutes, shaking them so that the oil drains off (I place mine on kitchen roll).
Give the chips another few minutes in the hot oil until they are golden and puffy before draining on more kitchen roll. Sprinkle your lemon salt over and that's it! Drool and enjoy because they are delicious...light and fluffy on the inside, crispy and salty on the outside. Heaven on a plate.