Gin and tonic granita

Method

1. Heat the water with the sugar for about 5 minutes until dissolved. Add the remaining ingredients and pour into a freezer-proof container. Cool to room temperature, then freeze. After 1 hour, remove and whisk with a fork (or whizz in a food processor) to break up the ice crystals, then return to the freezer.
2. Repeat after another hour. Before serving, break up the granita with a fork to give it a softer texture. Serve topped with edible flower petals, such as violas, if you like.