Peel, quarter and core the apples. Cut the flesh into cubes. Put them into a pot with lemon juice, 30 g sugar and 35 ml water, bring to the boil and steam for about 10 minutes while stirring.
Let the compote cool down. Cream mascarpone, quark, milk, vanillin sugar and 50 g sugar. Mix apple juice and Calvados. Line a rectangular form with the lady fingers (put 2 pieces aside) and sprinkle with the liquid.
Spread the apple compote on top. Finally spread the mascarpone cream loosely on top. Dust with cocoa and cinnamon. Crumble the rest of the sponge cake and sprinkle over the tiramisu just before serving.