Ingredients

　　1 cup packed parsley sprigs

　　1/2 teaspoon grated lime zest

　　1 cup cold water

　　1/2 cup fresh lime juice

　　1/2 cup sugar

　　1 (10-ounce) bottle club soda

　　Purée all ingredients except club soda in a blender 1 minute. Strain through a fine-mesh sieve into a large glass measure. Serve over ice and top off drinks with club soda.

　　Cooks' note:

　　For alcoholic drinks, add 2 tablespoons gin or vodka.