In a blender, combine the yogurt, basil, Lemon Simple Syrup, and ice. Blend until smooth and frothy. Pour into frosted glasses and serve immediately.
In a small saucepan, combine the water, sugar, and lemon zest over medium heat. Bring to a boil, reduce the heat and simmer for 5 minutes, stirring occasionally, until the sugar has dissolved. Take the pan off the heat and allow the syrup to cool, about 20 minutes. Strain before using.
Recipe courtesy of Giada De Laurentiis, 2008