First, the layers are each prepared in their own bowl:
In the first bowl, mix poppy seeds, sugar and vanilla sugar and set aside.
Then the quark filling in the next bowl: beat the quark, salt, sugar, vanilla sugar and the eggs well.
Nut filling in another bowl: mix grated walnuts, sugar and vanilla sugar.
Apple filling also in a separate bowl: finely grate the apples and mix with salt, sugar, cinnamon and vanilla sugar.
Also prepare the Schlagobers topping: whisk Schlagobers with the eggs well.
For the fat glaze, briefly heat the butter so that it becomes liquid. We did this in the microwave.
Preheat the oven to 180°C (356°F) top and bottom heat.
Now we begin layering the Gibanica:
Grease a large deep baking dish with a little fat and place the shortcrust pastry base on it.
Place a layer of strudel dough on this shortcrust pastry base.
Place half of the poppy-seed filling on this.
Over this poppy filling, place either a layer of fat-based glaze or a whipped-cream glaze.
Then place a second layer of strudel dough on top.
Place half of the quark filling on this.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
Then place the third layer of strudel dough.
Now place half of the nut filling on top.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
The 4th layer of strudel dough
Now spread half of the apple filling over it.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
Now the 5th layer of strudel dough.
Spread the remaining poppy seeds.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
The 6th layer of strudel dough
The remaining quark layer.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
The 7th layer of strudel dough.
The remaining nut filling.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
The 8th layer of strudel dough.
Add the remaining apple filling.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
The 9th layer of strudel dough.
Here again place either a layer of fat-based glaze or a whipped-cream glaze.
And the 10th layer of strudel dough as the final layer
Bake the Gibanica in the oven at 180° C (top and bottom heat) for about 60 minutes.