For the yeast dough, mix 375 g flour, 75 g sugar and 1 pinch of salt in a mixing bowl. Add 75 g butter in flakes and add 1 egg. Warm 1/8 l milk lukewarm. Crumble yeast into it and dissolve it.
Add to the flour mixture. Knead to a smooth dough with the dough hooks of the hand mixer. Cover the dough and let it rise in a warm place for about 40 minutes.
Meanwhile, chop the candied poppy seed very finely for the poppy seed mixture. Boil 1/2 l milk, 1 pinch of salt and 150 g butter in a pot. Stir in poppy seeds and 200 g sugar. Turn off the heat and let the poppy seeds swell for 10-15 minutes.
Separate 3 eggs. Chill the egg whites. Stir in almonds, almond oil, candied peel, honey, starch, 3 eggs and 3 egg yolks. Leave to cool, stirring several times.
Grease a fat pan (deep baking tray; approx. 32 x 39 cm). Knead yeast dough with floured hands. Roll out on the fat pan and press to the edges. Let it rise again for about 20 minutes.
Meanwhile, for the crumbles, mix 300 g flour, 150 g sugar, vanilla sugar, 1 pinch of salt, baking powder, 1 egg and 150 g butter in flakes, first with the dough hooks of the hand mixer, then by hand to crumbles.
Preheat oven (electric cooker: 175°C/circulating air: 150°C/gas: level 2). Beat the egg white until stiff, fold into the poppy seed mixture in portions. Spread on the yeast dough and sprinkle the crumbles on top. Bake in a hot oven for about 35 minutes.
Let it cool down.