4 large ruby red grapefruit
1 cup sugar
1/4 cup champagne
Finely grate the peel of 1 grapefruit into a medium bowl and set aside. Juice grapefruit. Strain juice into the bowl along with the zest. Put the sugar in a noncorroding saucepan and stir in 1 cup of the juice. Heat the mixture over medium heat, stirring constantly, until the sugar dissolves. Do not let it boil. Blend sugar mixture into the grapefruit juice. Add champagne and chill thoroughly. Freeze, using a fork break up mixture regularly until it resembles shaved ice.
Makes 20 servings.