well i don´t use a deep frying pot i just use a frying pan like where you make meat or eggs, add some oil, not to much or they´ll get soft, just about to cover almost half way up of them, then add some salt to the oil and when its boiling start adding fries it´ll take about 10-20 min (depending on flame, quantity of fries, etc) an d they get crispy outside and soft inside, just make sure to drip them well so they dont get moisty with oil (you can use a papar towel underneath them) and as you take them out salt them again, thay get really tasty, or you can also use some seasoning to get that spicy taste.