Pour flour into a bowl and one in the middle.
Press trough. Warm 125 ml milk and 1 tablespoon sugar lukewarm. Crumble yeast into it and dissolve it. Pour into the bowl and mix with some of the flour to make a pre-dough. Cover and leave to rise in a warm place for about 15 minutes.
Separate 1 egg. Melt 75 g butter at low heat. Add 50 g sugar, 1 pinch of salt, melted butter, 1 egg, 1 egg yolk and 125 ml milk (room temperature) to the pre-dough. Knead everything smooth with the dough hooks of the hand mixer.
Cover the dough and let it rise for about 45 minutes.
Grease the springform pan with the tube sheet insert (26 cm Ø). Chop pistachios and cranberries finely and mix well with hazelnuts, brown sugar, 2 eggs, 1 egg white and 5 tbsp. water with your hands or a wooden spoon.
Knead the dough again and put it on some flour.
roll out into a rectangle (approx. 32 x 50 cm). Place the nut filling on top and spread. Roll up the dough from the long side.
Place the roll in the mould with the seam facing down, press the ends together. Make several oblique cuts in the surface with a sharp knife. Cover and leave to rise for about 15 minutes. Bake in the preheated oven (electric oven: 175 °C/ convection oven: 150 °C/gas: level 2) for 40-45 minutes.
Cool down about 10 minutes, remove from the mould, let cool down.
Heat the jam, pass through a sieve. Coat the wreath with it. Sprinkle with pistachios and sugar crystals.