Roughly chop the chocolate, melt it in a bowl over a warm water bath, then let it cool down for about 10 minutes. Grease 2 glasses (1 litre capacity, 8-9 cm Ø) and sprinkle with breadcrumbs. Separate the eggs. Beat the egg whites and 4 tablespoons of cold water until stiff, sprinkle with sugar and vanillin sugar. Stir in egg yolk. Stir in chocolate.
Mix flour, cocoa and starch. Sift the flour mixture into 2 portions over the mixture and fold in. Pour the mixture into the glasses and bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 25 minutes. Drain the apricots in a sieve, then cut into small cubes except for 2 pieces. Take glasses out of the oven and let them cool down briefly. Carefully remove the cake from the edge, turn it over and let it cool down on a cake rack. Cut the cake horizontally into 6 slices each. Put 150 ml of cold water into a fat-free bowl. Add the powder all at once and whisk with the whisk of the hand mixer first briefly, then beat at highest speed for approx. 3 minutes until creamy. Stir in yoghurt and the apricot cubes. Spoon the cream onto the 12 sponge cake slices with a spoon and let the cream get a little firm, then place 3 slices on top of each other.
Carefully remove the cake from the edge, turn it over and let it cool down on a cake rack. Cut the cake horizontally into 6 slices each. Put 150 ml of cold water into a fat-free bowl. Add the powder all at once and whisk with the whisk of the hand mixer first briefly, then beat at highest speed for approx. 3 minutes until creamy. Stir in yoghurt and the apricot cubes. Spoon the cream onto the 12 sponge cake slices with a spoon and let the cream get a little firm, then place 3 slices on top of each other. Cut the remaining apricot halves into slices. Decorate each tartlet with apricot slices, sponge crumbs (from cutting) and mint
45 minutes waiting time