For the dough melt 75 g butter. Add milk. Put flour, 50 g sugar and salt in a bowl. Stir yeast and 1 tablespoon sugar until liquid. Add lukewarm milk-fat-mixture, yeast and egg to the flour and knead all ingredients with the dough hook of the hand mixer to a smooth dough. Cover the dough and let it rise in a warm place for 30-60 minutes until the volume of the dough has doubled
Roughly chop the nuts. Melt 50 g butter in a small pot. Mix 75 g sugar and cinnamon. Knead the yeast dough again and roll out rectangularly (approx. 36 x 42 cm) on a floured work surface. Place on a baking tray lined with baking paper
Brush the pastry plate with part of the butter and sprinkle with approx. 3/4 of the cinnamon sugar. Add approx. 500 g plum puree and smooth it down. Sprinkle about 3/4 of the nuts on top. Roll both long sides up to the middle. Spread the rest of the plum puree in the middle and sprinkle the nuts on top. Spread the dough with remaining butter and sprinkle with remaining cinnamon-sugar
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 25-30 minutes. Let them cool down. Stir icing sugar with rum until smooth. Spread the icing over the yeast strip with a spoonful of icing. Allow to dry
Waiting time approx. 3 minutes