Crush the whole grain cookies thoroughly and press them into a springform pan to form the crust. Freeze for 30 minutes to set.
Prepare the creamy filling by mixing cream cheese, quark, oil, eggs, sugar, vanilla sugar, whipped cream stabilizer, heavy cream, and pudding powder until smooth.
Pour the filling over the chilled crust.
Bake in a preheated oven at 175°C (347°F) for about 60 minutes.
While baking, cook the strawberries with sugar, then add cornstarch mixed with water and blend into a smooth sauce.
Once baked and cooled slightly, spread the strawberry sauce evenly over the cheesecake.
Refrigerate for at least 5 hours to set completely.