The Berries
Bring the wine, cinnamon, grapefruit juice, ginger, pepper and sugar to a simmer over medium heat.
Cool, strain and pour liquid over strawberries and marinate for 6 hours.
Stir in the mint and divide into 8 bowls.
Garnish with the granita

The Granita
Combine half the berries, the sugar and 1/3 cup water in a medium saucepan.
Bring to a simmer to dissolve the sugar.
Transfer the mixture to a food processor, add the reserved berries and process until smooth.
Strain through a fine mesh sieve, stir in the champagne and lemon juice.
Scrape mixture into a shallow metal baking pan (8 or 9 inches is fine) and freeze.
Every 20 minutes, stir and scrape the granite.
After several hours the granite will be ready to serve, shale-y and roughly frozen.
You can also freeze completely and pulse the frozen granite in a food processor.
You can also scrape the granite with a spoon instead of processing it.