Separate the eggs and beat the egg whites into egg whites. Beat the skyr, egg yolks, sugar, vanilla sugar and salt until frothy. Let the semolina trickle in while stirring. Now carefully fold in the egg whites. Place in one or more greased molds and sprinkle with berries decoratively.
Place in the preheated oven for about 20 minutes.
Do not expose the soufflé to a drag, otherwise it will unfortunately collapse quickly. Serve immediately.