For the sponge cake, pour out 1 cup of cream, put the cream aside. Wash the cup, dry well and use as a measuring cup. Line the bottom of a springform pan (26 cm Ø) with baking paper. Separate the eggs.
Beat the egg white with the whisk of the mixer until stiff, while beating 3⁄4 cup (150 g) of sugar, vanilla sugar and 1 pinch of salt. Stir in the egg yolks one by one. Mix flour, baking powder and almonds and fold into the egg mixture.
Pour into the mould and smooth down.
Mix the flaked almonds and 1⁄4 cup (50 g) of sugar. Sprinkle on the sponge mixture. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer) for approx. 25 minutes. Take out and immediately pour 1⁄2 cup (100 g) of cream over it.
Bake in a hot oven for another 10 minutes. Take out. Leave to cool in the mould.
For the filling 1 1⁄2 Whip the cup (300 g) of whipped cream until stiff. Add Lemon Curd, except for 2 tbsp., briefly under the cream, so that streaks appear. Remove the sponge cake from the mould and cut through horizontally.
Spread the cream loosely on the lower base. Spill 2 tbsp. lemon curd on the cream. Place the upper cake layer on top and chill until serving.