Peel and wash the potatoes and cut them into 0.5-1 cm thick sticks. Heat the oil in a pot to approx. 160 °C. Fry the potato pegs in it in portions for 8-10 minutes. Take them out and let them drip off on kitchen paper.
Mix cheese with yoghurt, season with salt and pepper. Keep ready fries warm in a hot oven. Season sweet potato fries with sea salt and serve with the dip.