Mix all ingredients, except nutmeg, with cracked ice in a shaker or blender and strain into a chilled highball glass. Sprinkle with nutmeg.

*To Make Sugar Syrup: In a saucepan, gradually stir one lb. granulated sugar into 13 oz. hot water to make 16 oz. sugar syrup. Granulate sugar does not dissolve easily in cold drinks, but this simple syrup, being liquid, is the perfect alternative.