Preheat the oven at 175 degrees Celsius.
Peel the apples and cut away the seeds. Cut in thin slices.
Place the apples in a bowl and mix with the ingredients for the filling, sugar, starch, cinnamon powder, cardamom powder and brown sugar.
In a bowl mix the oatmeal, sugar, vanilla sugar, flour and baking powder.
Melt the butter in a sauce pan.
Pour it in the bowl with the dry ingredients.
Add the syrup and mix it all well.
Spread it evenly over the apples in the pie form.
Place in the middle of the oven for 35 minute.
Take it out and let it cool down.