Mix all ingredients, except for the apple, into a batter and pour into the springform pan. Cut the apple into thin slices and cover the dough with it. It looks most beautiful when it is covered in a circle from the outside in.
Bake at 175 ° C for about 15 minutes until the dough has `slipped through`. But it depends a lot on the furnace, you have to keep an eye on it. The cake is more flat like a tart.
The recipe has 1830 kcal, with 12 pieces that makes 150 kcal per piece.