Soak the cranberries in 3 tablespoons of rum. Knead 125 g flour, 60 g sugar, 1 pinch of salt, 60 g butter in pieces, 1 egg yolk and possibly 1-2 tbsp. cold water first with a hand mixer and then briefly with your hands until smooth. Cover and chill for about 30 minutes.
Grease the springform pan (26 cm Ø). Peel, quarter, core and roughly dice apples. Drizzle apple cubes with 2 tbsp. lemon juice
Cream 125 g butter, 100 g sugar, 1 pinch of salt, 2 tbsp lemon juice and zest. Stir in 2 eggs one by one and then cream. Mix 175 g flour and baking powder, stir in briefly. Spread into the form. Mix apples and cranberries, spread on top
Roll out short pastry between 2 layers of foil to form a circle (26 cm Ø). Remove the upper foil. Place the dough on the apples using the lower foil and remove the foil. Press the dough lightly
Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 1 hour. Let them cool down. Mix icing sugar and 3 tbsp. rum and spread on the cake. Sprinkle with sugar crystals. Leave to dry