2 cups superfine sugar
1 cup hot water
11⁄2 cups fresh lemon juice
11⁄2 liters sparkling seltzer water, chilled
Garnish: lemon slices
1. In a large pitcher, whisk together 1 cup hot water and sugar until sugar dissolves. Stir in lemon juice. Cover and refrigerate for 1 hour or until cold.
2. Stir in sparkling water just before serving. Garnish with lemon slices, if desired. Serve over ice.