for a tart mould Ø28cm
Mix together the flour and baking powder, then sieve.
Mix together the sugar, milk, oil and eggs, then add the flour/baking powder.
Pour into the mould and arrange the apples on the top.
Cook for 30 minutes at 160°C (320°F).
Melt the butter, then add the sugar, making sure it has dissolved before adding the eggs and scraping out the vanilla pod.
Pour over the apple cake then cook again at 180°C (350°F) for 10 minutes.
Remove from the oven and dust with icing sugar.