For the dough mix the flour, vanilla sugar, 90 g powdered sugar and the margarine in a bowl. Stir with a spoon and then knead with your hands until you have one consistent dough. Put in the fridge for at least 30 minutes.
Preheat the oven to 180 °C (or 360 °F).
Grease the pie pan(s) with vegetable oil.
Take the dough out of the fridge and knead until it is a little softer. Spread it in a thin layer in the pie pan(s). Prick it two or three times with a fork.
Put the pie pan(s) in the oven for about 20 to 25 minutes. Take them out and let them cool. I left the crusts in the pans.
In a bowl mix the yogurt, the cream cheese and 100 g powdered sugar.
Fill this mix into the pie crust(s).
Put the pie(s) into the fridge for at least 4 hours.
Decorate the pie(s) with fruits before you serve it/them.