To make Mango Puree, place mango, sugar and water in blender. Cover; blend on high speed until smooth. Makes about 1 1/2 cups.
To make margarita, add 3 tablespoons of the mango puree, the tequila, orange-flavored liqueur, lime juice and torn basil leaves to cocktail shaker. Fill shaker with ice; cover and shake vigorously. Strain into cocktail glass filled with fresh ice; top with club soda. Garnish with mango or additional Thai basil leaves.