1/2 cup sugar
1/2 cup water
1 1 1/4-inch-long piece fresh ginger (about 1 inch in diameter), sliced
2 medium mangoes, peeled, pitted
1/2 cup vodka
20 ice cubes
1. Combine sugar, 1/2 cup water and ginger in heavy small saucepan. Stir over medium heat until sugar dissolves. Simmer 5 minutes. Remove from heat. Cover; let steep 1 hour. Strain ginger syrup. Cool. (Can be made 1 day ahead. Cover; chill.)
2. Puree mangoes in blender. Pour into measuring cup. Return 3/4 cup puree to blender (reserve any remaining puree for another use). Add 1/2 cup ginger syrup (reserve any remaining syrup for another use), vodka and ice cubes to mango puree in blender. Blend until smooth.