Melt 225 g butter. Grease a springform pan (approx. 26 cm Ø) and dust with flour. Mix 400 g flour, 200 g sugar and 1 pinch of salt. Knead in the liquid butter and egg with the dough hooks of the mixer. Put half of the dough into the form and press it to a flat bottom while lifting up one edge.
Coarsely grate the marzipan. Knead remaining dough with marzipan and 2 tbsp. flour to form crumbles.
Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Mix 2 tablespoons sugar, vanilla sugar and 1 teaspoon cinnamon. Peel ginger and grate finely. Peel, quarter and core apples and slice or cut them into thin slices. Mix cinnamon sugar, ginger and apples.
Place apples in the form on the dough and spread evenly. Sprinkle marzipan crumbles over it. Bake the cake in a hot oven for about 1 hour. After about 45 minutes, cover with baking paper if necessary. Let the finished cake cool down on a cake rack.
For this cake use apples that have a fine acidity and do not fall apart during baking, e.g. Boskop, Cox Orange or Elstar. And you get cream as a nice blob on top! To make it taste fresher, simply stir in some crème fraiche.