For the crumbled dough, place flour, baking powder, 160 g sugar, salt, egg and fat in flakes in a large bowl. Work into crumbles with your hands. Fill 2/3 of the dough into a greased spring plate sprinkled with flour (base has 26 cm Ø).
Press the dough to a height of about 2 cm at the edge. Mix the remaining dough and chopped almonds and put in a cool place. In the meantime clean and wash the fruits and cut the strawberries a little smaller. Stir 50 ml water, 125 g sugar and red fruit jelly powder until smooth.
Boil 400 ml water. Add mixed powder while stirring continuously, bring to the boil again. Carefully fold in the fruit and spread on the dough base. Sprinkle with remaining crumbles and flaked almonds.
Bake on the lower rack in the preheated oven (electric oven: 200 °C/ gas: level 3) for 25-30 minutes. Allow to cool slightly, remove from the mould and serve dusted with icing sugar.