The cake is stirred together quite quickly. The best way to start is to preheat the oven to 180 degrees because it goes so quickly. Then mix the dry ingredients together. Add the liquid ingredients and mix everything briefly but evenly. Fill the dough into a springform pan (Ø 28 cm) and smooth it down. Halve and core the pears. Cut into slices lengthwise. Spread on the dough and press down lightly. Spread berries on top. Bake on the 2nd rack from the bottom for 25-30 minutes. If the surface does not brown nicely, switch to convection oven for the last 10 minutes. Brush with jelly while still hot. Let cool on a cake rack.