Pour the flour into a bowl and press a depression into it. Warm 50 ml milk lukewarm. Crumble yeast into the hollow, add 30 g sugar and milk and mix with some flour from the rim to a thick mash. Cover the pre-dough and let it rise in a warm place for about 15 minutes
Melt salted butter, add 50 ml milk and warm it up lukewarm. Add the egg and milk mixture to the pre-dough and knead to a smooth dough using the dough hooks of the hand mixer. Cover the dough and let it rise again for about 30 minutes
Knead the yeast dough again and roll out into a circle (26 cm Ø) on a floured work surface. Spread the springform pan (26 cm Ø) with fat and line with the dough. Cover and leave to rise in a warm place for about 15 minutes
Bring butter, 40 g sugar and honey to the boil in a pot and simmer for about 5 minutes. Stir in flaked almonds. Let cool down for about 10 minutes. Spread on the dough. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for about 20 minutes. Take the cake out of the oven and let it cool down on a cake rack
Wash blueberries, sort and drain very well. Soak gelatine in cold water. Mix mascarpone, 100 g sugar, vanillin sugar and lemon juice with a whisk until smooth. Whip the cream with the whisk of the hand mixer until stiff. Squeeze the gelatine, dissolve and mix with 3 tbsp. of the mascarpone cream. Stir the gelatine into the remaining mascarpone cream. Gradually fold in the cream
Cut the yeast dough base in half horizontally. Cover the bottom cake layer with a cake ring and put 1/4 of the blueberries in the middle. Mix the remaining blueberries into the cream. Spread the mascarpone blueberry cream on the base and smooth it down. Place the second cake base on top and chill for at least 2 hours
Place a piece of baking paper on a baking tray. Caramelise 30 g sugar in a pot. Add the almonds, stir briefly and place on the baking parchment immediately. Use two spoons to separate the almonds before the sugar becomes solid
Remove the cake from the ring and decorate with the caramelized almonds
waiting time approx. 4 1/4 hours