Mix the mascarpone, quark, 250 g applesauce, 0.5 teaspoon cinnamon, 30 g powdered sugar, 2 tablespoon lemon juice, and vanilla sugar together until well combined.
Quarter, core, and finely dice the 2 apples. Immediately toss the diced apples with 1 tablespoon lemon juice and 300 g applesauce.
Break the 50 g ladyfingers into pieces.
In glasses or a large bowl, layer the apple-applesauce mixture, ladyfinger pieces, and mascarpone cream mixture, alternating as you go.
Refrigerate for 1 hour. Garnish with apple slices if desired before serving.