Preheat the oven to 200°
First of all core the four apples, peel them and cut them in 4 parts.
Whisk together the flour, 40g sugar, 100g butter and the one egg yolk.
Add two tablespoons of cold water and mix until you get a typical shortcrust pastry.
Roll out the dough and put it into a buttered springform pan.
Sprinkle the grated almonds on the dough.
Peel the apples, cut them in quarters then place them into the pie tin. Cut carefully lengthwise into the apples.
Melt the remaining 20g of butter and brush the apples with it.
Put the springform pan into the oven and bake for 35 minutes.
Meanwhile beat the remaining 100g sugar, the vanilla sugar, the cream and three eggs together until you get an even cream.
After the 35 minutes of baking take the pie out of the oven and pour the cream over the apples.
Bake for another 20 minutes.
Let the pie cool down for about an hour on a cooling tray.
Enjoy!!!!!!!