Pour the flour into a bowl and press a depression into it. Heat 60 g milk and 20 g sugar. Dissolve yeast in it, pour into the hollow and cover with some flour. Cover and leave to rise in a warm place for about 5 minutes.
Add 60 ml milk, 20 g sugar, salt, lemon zest, egg and 50 g fat to the pre-dough and knead everything into a smooth dough. Cover and leave to rise for another 10 minutes. Roll out the dough about 4 mm thick on a floured work surface and cut out circles with a cookie cutter (about 10 cm Ø).
Knead dough remains together, roll out again and cut out. Results in about 16 pieces. Form dough circles into small balls and place them close together in a greased casserole dish (16x25 cm; 1.2 l capacity).
Let it go for another 10 minutes. In the meantime, heat the remaining milk, 20 g sugar and the remaining fat and pour over the cakes. Bake the "Buchteln" in a preheated oven (electric cooker: 200 °C/ gas: level 3) for about 25-30 minutes.
In the meantime, except for a few pieces for decoration, puree the mango with a blender. Cut the rest of the mango into slices. Stir the starch and 1 tablespoon of water until smooth. Caramelise the remaining sugar in a pot.
Deglaze with wine and simmer for about 5 minutes. Stir in cornflour and bring to the boil again. Add the raspberries, except for a few for decoration, and let it simmer for about 5 minutes. Pass through a sieve and let cool off.
Arrange the Buchteln lukewarm with mango and raspberry sauce on plates. Decorate with mango wedges, remaining raspberries and mint.