Preheat the oven to 150 ° C (convection). Put all ingredients for the dough, except for the fruit, in a bowl and mix with a mixer. Now put the dough in a springform pan that has been greased with butter.
Now cut the fruit into small pieces and peel it. Then place the fruit on the dough.
Knead the ingredients for the crumble so that the crumble is small and crumbly. Finally, spread the crumble over the fruit and bake the cake at 150 ° C for 40 minutes.