Put flour, crumbled yeast, sugar, 1 egg, lemon rind, milk, salt and soft fat in a bowl and knead to a smooth dough. Cover the dough and leave to rise in a warm place for about 30 minutes.
Chop the ginger finely. Mix poppy seed mixture, chopped ginger and condensed milk. Knead the yeast dough again well and roll out on a floured work surface to a rectangle of approx. 40 x 60 cm.
Spread the poppy seed mixture on the dough, leaving an approx. 2 cm wide rim all around. Roll up the dough from the long side. Place the roll in a wreath on a baking tray lined with baking paper.
Separate remaining egg. Brush the ends of the dough with the egg white and press them firmly together. Use a sharp knife to cut the surface of the wreath in a zigzag pattern to a depth of approx. 2 cm. Whisk the egg yolk and some water.
Paint the wreath with it. Grease a springform pan rim (26 cm Ø) and sprinkle with breadcrumbs. Place the rim around the wreath. Leave the wreath to rise for another 15 minutes. Then bake in a preheated oven (electric: 200°C/ gas: level 3) for 40-45 minutes, covering with aluminium foil after about 20 minutes.
Let the wreath cool down. Mix icing sugar and lemon juice. Spread the icing over the tops of the wreath and allow to set. Results in about 20 pieces.