The best potato chips or fries

One of the best tips I ever got from Nigella, I use more often than any other, and that is related to the perfect potato chips or fries.  Nigella suggests that you actually put the chopped potatoes into the oil BEFORE you start heating the oil, and trust me...it works!  I do that every time I make fries and they have never failed!
I suggest you do the same to get the perfect result!