This is the absolute perfect dish to serve as a palate cleansing pre dessert, if you are the type of person who likes to serve palate cleansing pre desserts.
You'll need one of those foamer canister things (we have an ISI Whip) but, given you're a person who is considering serving a palate cleansing pre dessert, you've probably got one.
150ml tonic water
4 egg whites
125ml lime juice
250ml lime juice
Serves 4, 8 pro points per portion
First make a sugar syrup by bringing the sugar and tonic water to the boil, and then allow to cool.
Mix 250ml fresh lime juice with 150ml gin and half of the cooled sugar syrup. Transfer to the freezer, taking out to fork briskly now and then (obviously you will need to do this stage well in advance).
Loosen the egg whites with a whisk or a fork then add the rest of the lime juice and the gin and the other half of the sugar syrup. Put all the ingredients into the canister.
Prior to serving, you want to warm the foam through; fill a large beaker with boiling water and sit the flask in it for 10 minutes or so.
To serve, put granita in the bottom of the glass (you may not need to use it all) and top with the warm foam. You will need to move quickly as the granita will start to melt almost immediately.