For the dough, knead icing sugar, 400 g flour, 175 g butter and 1 egg until smooth. Cover and chill for about 30 minutes.
For the compote, peel, quarter, core and cut apples into pieces. Caramelise the sugar in a large, wide pot while stirring until golden. Melt 50 g butter in it. Deglaze with lemon juice.
Add apples and simmer for about 5 minutes. Remove apples with a skimmer. Stir 1 tsp. starch and 1 tbsp. cold water until smooth. Boil up the caramel. Stir in the starch and simmer for 1 minute, stirring continuously (if necessary, thicken with 1⁄2 TL starch).
Fold in apples and cranberries.
Roll out the marzipan round (approx. 26 cm Ø). Grease a tart mould with a lifting base (26 cm Ø) and dust with flour. Approximately 2⁄3 of the dough on little flour roll out round (approx. 30 cm Ø) and line the form with it.
Press the dough at the edge, cut off any excess dough. Prick the base more often with a fork. Place marzipan on top.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Knead dough and remaining dough and roll out round (approx. 28 cm Ø). Use a knife to cut into strips approx. 1 cm wide.
Put the compote into the mould. Place half of the dough strips on top with a gap between them. Place the rest of the strips diagonally on top, forming a grid. Whisk the egg yolk and milk. Brush the dough grid with it. Bake in the oven on the lowest shelf for 35-40 minutes.
Let it cool down. Dust with icing sugar.