Separate eggs. Beat the egg whites and 2 tablespoons of cold water until stiff, adding sugar. Stir in egg yolks. Mix flour, starch and baking powder, sieve onto the egg mixture and fold in carefully. Pour the sponge mixture into a greased fruit base mould (22 cm Ø) dusted with flour and smooth it down. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 10-15 minutes.
Remove the sponge cake from the oven, let it cool down briefly and remove from the mould. Let the base cool down on a cake rack. Spread the cold fruit base with lemon curd. Peel and slice the kiwis. Spread the sponge cake with kiwis in a fan shape, green kiwi slices on the outside and yellow on the inside. Decorate with lemon balm before serving
30 minutes waiting time