1 (750 ml) bottle dry white wine
1 cup sugar
Zest the lemons and place the lemon zest in a medium saucepan. Juice them and add the juice to the pan with the zest. Add the wine and the sugar and bring the mixture to a boil, stirring to make sure the sugar is dissolved. Boil for one minute. Remove the mixture from the heat and pour into a 9 x 13 pan. Let cool to room temperature, then freeze until solid.
Remove the mixture from the freezer and use a fork to rake it into crystals. Serve immediately.