Peel and wash sweet potatoes and cut them into thick sticks (like chips). Put them in a bowl, dust with starch and turn.
Heat the oil in a wide pot or in the deep fryer to approx. 180 °C (it is hot enough as soon as small bubbles appear on a wooden skewer). Fry the potato pegs in it in portions for 6-8 minutes.
Lift out with a skimmer and allow to drip off on kitchen paper. Season with salt.