Knead the flour, yeast, milk, sugar, butter, egg, egg white, salt and lemon zest with the dough hook of the hand mixer to form a smooth dough for at least 5 minutes. Cover the dough with a damp cloth and let rise for 1 hour in a warm place just under 40 ° C. The volume should double.
If necessary, knead in the raisins and shape the dough into a flatbread. Let rise another 1/2 hour. Mix the egg yolk and milk and brush the flatbread with it. Possibly spread the almond flakes on top.
Bake in a preheated oven at 200 ° C. Switch down to 175 ° C after 10 minutes. The baking time is approx. 40 minutes. If necessary, cover with baking paper at the end.