For the dough, put egg, sugar, vanilla sugar and flour in a mixing bowl. Melt the fat. Heat milk lukewarm. Dissolve yeast in it. Knead the yeast milk and fat with the dough hooks of the hand mixer into the flour mixture to a smooth dough.
Form into a ball with floured hands and cover and leave to rise in a warm place for 20 minutes. In the meantime, wash the plums, cut them in half and stone them. Cut the flesh into slices. Divide the dough.
Roll out one half onto a greased, deep baking tray and let it rise again. Roll out the rest of the dough to the same size on a floured work surface. For the brittle, melt the fat and dissolve the sugar in it.
Add cream and let it boil down for two minutes. Stir in almond slivers. Spread the plums on the baking tray. Place the second pastry sheet on top. Spread almond cream on top. Bake in the preheated oven (electric: 175 ° C/ gas: level 2) for 40 minutes.
Makes 25 pieces.