Preheat the oven to 150 °C. For the sponge cake whisk eggs with sugar and salt. Sieve starch, flour, cocoa powder and baking powder and fold into the batter. Put baking paper on a baking tray, pour the batter on baking paper and bake for approx. 15 minutes.
In the meantime, whip cream until stiff and soak the gelatine leaves in cold water. Mix mascarpone with eggnog and sugar, heat approx. 3 tbsp of the cream and dissolve the gelatine in it. Add back to the rest of the mascarpone frosting, mix and fold the whipped cream into it.
Let the sponge cake cool. Pour the cream on the cake and cool for 2-3 hours. Cut into small cakes and top with some more eggnog and if you want mini chocolate easter eggs.
Tipps
You can also cut out circles instead of rectangular cakes.