Cream 150 g butter, sugar, salt and vanilla sugar with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour and baking powder and stir in alternately with lemonade.
Pour into a greased, large Savar form (22 cm Ø; 1.25 litre capacity) dusted with flour and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 35 minutes.
Remove and let it cool down.
Cream 75 g butter and 50 g icing sugar with the whisk of the hand mixer. Add cream cheese and stir for another 2-3 minutes. Stir Lemon Curd in streaks under the Frosting.
Carefully turn the cake out of the tin and cut through horizontally 2 times. Place the lower ring on a cake plate and spread 1/3 of the frosting on it. Place the middle ring on top and spread with half of the remaining frosting.
Place the upper ring on top and coat with remaining Frosting. Chill the cake for at least 1 hour.
Wash the strawberries, drain well and clean. Puree the strawberries with 2 tbsp. icing sugar. Before serving let some strawberry sauce run over the cake.