Peel and wash the potatoes and grate them roughly in a bowl. Season with salt and put aside for a short time. Mix horseradish and yoghurt until smooth. Cut salmon slices crosswise into halves or thirds, depending on size. Squeeze the potatoes well over a sieve and place in a bowl.
Stir egg and flour into the potatoes and season with salt and nutmeg. Heat the oil in portions in a pan and fry about 20 small Rösti over medium heat until golden brown. Remove the finished Rösti and let them drip off on kitchen paper. Spread the cream on the Rösti and cover with salmon, sprinkle with cress
With 8 people: