Combine all ingredients into a freezer friendly container and freeze 6-8 hours or overnight. Remove from freezer and allow to soften a little. Put chunks of frozen mixture into a food processor and process until all crystals have disappeared and mixture is smooth. Re-pack into container and keep frozen until needed. This will keep for up to 2 months. If you prefer a lighter, less icy sorbet, add 1 egg white during processing.
Makes 3 cups.