Wash well and peel your potatoes and cut into chips – approx 1 cm for thick cut chips, half that for thinner ones. Rinse well under cold water, then drain.
Put the chips into a pan of cold, salted water, and bring to the boil. Turn down the heat, and simmer until just soft to the point of a knife.
Drain, pat dry and allow to cool, then put in the fridge until cold.
Heat your kadai with cooking oil. Check with one chip to ensure the oil is hot enough. Then, add a batch of chips. Don’t overcrowd the pan. Blanch for about five minutes until cooked through but not colored.
Remove, drain, pat dry with tissue paper, and again refrigerate.
When you’re ready to eat, heat the oil again to hot enough to fry and add the chips. Cook until crisp and golden, then remove, drain, season.