Heat the milk and melt the fat in it. Put flour, sugar, vanilla sugar, egg, salt and crumbled yeast in a mixing bowl. Add the milk and knead with the dough hooks of the hand mixer to a smooth dough. Cover and leave to rise in a warm place for about 40 minutes. Drain the apricots and cut into small cubes. Knead egg white, 2 tablespoons apricot juice, marzipan, 100 g icing sugar and almonds with the dough hooks of the hand mixer to a smooth dough. Carefully fold in the apricot cubes.
Knead the yeast dough again well and roll out to a rectangle (55 x 45 cm) on a floured work surface. Put the marzipan-apricot filling on the yeast dough and smooth it down. Roll up the yeast dough from the short side and cut into approx. 15 slices. Place 5 snails on a baking tray lined with baking paper, let them rise for another 15 minutes and bake in the preheated oven (electric cooker: 200°C/ gas: level 3) for 15-20 minutes. Stir the remaining icing sugar and 2-3 tablespoons of cold water until smooth. Take snails out of the oven, let them cool down a little and coat them with icing. Results in about 15 pieces