Peel and halve the apples, remove the core and divide into wedges.
Separate the eggs, beat the egg whites with 1 tablespoon of sugar until stiff. Whisk the egg yolks with the flour, 1 tablespoon of sugar, vanilla sugar, milk and salt. Subject the egg whites.
Bake the dough in 4 portions:
Heat a little clarified butter in a coated pan. Pour in the egg mixture, spread the apple wedges on top (enough so that the rest is enough for 3 servings), put on the lid and let set over a mild heat. When the pancake is golden brown at the bottom, turn it over. Let it set briefly on the underside, then tear it apart with 2 spatulas. Finally, sprinkle 1 tablespoon of sugar on each pan and let it caramelize while turning.
Keep the Schmarrn warm in the large saucepan until all of the batter is baked.
Heat the vanilla sauce in a container while baking and serve with the Schmarrn.