Wash apples, cut into slices, remove core and sprinkle with 4 tablespoons lemon juice. Heat the liqueur, 1 tablespoon sugar and 3 tablespoons lemon juice in a pan. Steam apples in it for 2-3 minutes. Take them out, put them on kitchen paper and let them cool down.
Mix vanillin sugar and cream setting agent. Stir quark with cream stiffener mixture, 2 tablespoons sugar and milk until smooth. Finely crumble the lady fingers. Layer apples, cream and lady fingers in 4 glasses (250 ml each)
20 minutes waiting time