from _The Way to Cook_ Pulverize zest with 1 cup of the sugar in food processor for 2 min., then add 1 1/2 cups of the water and pulverize 2 min. More. In pan, combine zest with remaining sugar, bring to simmer and swirl pan until sugar dissolves. Remove from heat. Add juice and remaining water, and chill. Whisk in egg whites and freeze according to instructions. Pour a big spoonful of iced aquavit over each serving. Makes 2 quarts.