Place the ice and mint into the Thermomix bowl and mix for 7 seconds, Speed 3, Reverse.
Add the Limoncello, Prosecco and soda water and mix for 10 seconds, Speed 3, Reverse.
Divide between two glasses, garnish with lemon slices and serve.
Notes
This recipe can be halved or doubled.You will find Limoncello in the spirits aisle at your local BWS/Dan Murphy's stores.The soda water can be substituted with lemonade if you prefer.Add extra soda water for a less intense cocktail.