Rinse the potatoes, but do not remove the skin and do not make them too soft the day before.
Meanwhile, soak the pork nets in water for three hours.
Finely dice the pork liver, chop the leek and chop the onion. Mix well with egg, minced meat, flour and damassine. Season with salt and freshly ground pepper.
Form round pieces of about 15 cm in diameter. Spread out the pork nets, place each piece of meat in the middle, wrap the net over it and press it smooth.
Meanwhile, fry evenly in lard for fifteen minutes, turning a few times to the other side.
Peel potatoes, grate with rösti grater, fry in lard on both sides. Salt, season with pepper and bake until golden.