Put flour, 30 g sugar, lemon zest and 1 egg into a mixing bowl. Mix yeast and 10 g sugar in a cup until the yeast is liquid. Melt the fat, add cold milk and add the lukewarm mixture together with the yeast to the flour in the bowl. Knead with the dough hooks of the hand mixer for 2-3 minutes. Dust the moist dough lightly with flour and let it rise covered in a warm place for about 30 minutes.
In the meantime peel, quarter and core the pears. Mix the sour cream, 2 eggs, egg yolk, 35 g sugar, vanillin sugar and cornstarch until smooth. Drain the cranberries. Grease an ovenproof dish (approx. 26 cm Ø) well and sprinkle with flour. Pour the dough onto a well floured work surface, knead lightly and press into the baking tin. Press the dough up at the edge. Spread pears on top and pour the icing evenly over it. Bake in the preheated oven, 2nd shelf from below (electric oven: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes. Shortly before serving, sprinkle with cranberries and dust with icing sugar.
Pour the dough onto a well floured work surface, knead lightly and press into the baking tin. Press the dough up at the edge. Spread pears on top and pour the icing evenly over it. Bake in the preheated oven, 2nd shelf from below (electric oven: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes. Shortly before serving, sprinkle with cranberries and dust with icing sugar. Serve hot or cold