Sparkling Mango Limeade

Can be prepared in 45 minutes or less but requires additional unattended time.

3 ripe mangoes (about 2 1/2 pounds total)
1 1/2 cups fresh lime juice
1 1/2 cups water
1 cup superfine sugar plus additional to taste
seltzer water or club soda
Garnish: lime wedges

Peel mangoes and cut flesh from pits. In a blender purée mango flesh with lime juice, water, and 1 cup sugar until smooth. Force purée through a sieve into a pitcher or bowl, pressing on any solids. Chill purée, covered, until cold and then stir in additional sugar. (Purée will be slightly thick. Limeade purée keeps, covered and chilled, 2 days.)

Fill tall glasses with ice and add enough limeade purée to fill each glass by three quarters. Top off drinks with seltzer water or club soda, stirring well, and garnish with lime wedges. Makes about 5 1/2 cups limeade purée.