Grease a springform pan (28 cm Ø) and sprinkle the rim with flaked almonds. Pour cream into a bowl. Then measure sugar and flour with the cup and add to the cream. Add baking powder, eggs and lemon peel and mix everything well.
Pour into the springform pan, smooth it down and bake in the preheated oven (electric: 175°C/ gas: level 2) for approx. 25 minutes. Let it cool down. Drain the cranberries on a sieve. Hollow out the bottom, up to an approx. 2 cm wide rim.
Finely crumble the cake pieces. Whip cream until stiff, fold in crumbs and cranberries, except for 2-3 tablespoons. Fill into the cake in a dome-shaped form. Spread the remaining cranberries as small heaps on the cream filling.
Roast the flaked almonds, allow to cool and sprinkle on the cream edge. Keep cool until serving. Results in about 18 pieces.