SourceMartha Stewart Living, January 2010
4 cups water
1/2 cup sugar
3 tablespoons dried lavender blossoms (kalustyans.com)
4 1/2 cups sparkling water, chilled
Bring water and sugar to a boil in a large saucepan, stirring until sugar dissolves. Add lavender; remove from heat. Let stand for 30 minutes. Strain. Return to pan, and boil until reduced by half, about 5 minutes. Let cool completely. Fill each of 6 glasses with 3/4 cup sparkling water. Stir 1/4 cup syrup into each.