Peel and quarter the apples and remove the cores. Sprinkle with 5 tbsp. lemon juice
Grease a springform pan (26 cm Ø). Melt 125 g fat, let it cool down. Separate 1 egg. Mix flour, baking powder and 125 g sugar. Add 1 egg yolk, 4 tablespoons lemon juice and liquid fat and knead into crumbles. press 2/3 of the crumbles firmly into the springform pan
Separate two eggs. Mix 60 g fat and 75 g sugar until creamy. Add quark, 2 egg yolks, 6 tbsp. lemon juice and semolina and mix. Beat 3 egg whites until stiff and fold in
Spread the quark mixture on the crumble base. Spread apples on top. Sprinkle the remaining crumbles over the cake. Bake the cake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 1 hour until golden brown. If necessary, cover with parchment paper after about 30 minutes. Let it cool down
Sprinkle with sugar crystals and decorate with mint. Tastes good with egg liqueur cream