Limoncello Sponge Cake

1. Mix all the ingredients in a blender until smooth.
2. Pass the mixture through a sieve and pour into a 500 ml siphon.
3. Aerate with two whipping cream cartridges (N2O).
4. Pipe the mixture into paper coffee cups with a pinprick hole in the bottom. Fill no more than half-full.
5. Place in the microwave and cook at full power for 40 seconds.
6. Allow to cool upside down.

Serving suggestions: As a component in a dessert such as an addition to a popular cocktail variant; the cooked sponge can also be broken into pieces and dried in an oven or drying cabinet.