In a highball glass, muddle mint leaves, lime juice and simple syrup.
Fill glass with ice and add vodka and Midori.
Top with club soda and stir.
Garnish with a mint sprig.
Notes
* Use a gluten-free vodka such as Tito’s or Ciroc. SIMPLE SYRUP 1 cup (8 ounces) water 1 cup granulated sugar Bring the water to a simmer in a saucepan set over medium-high heat. Add the sugar and stir until it completely dissolves. Remove the pan from the heat. Set aside to cool to room temperature. Pour the syrup into a clean 1-pint bottle, cap it and refrigerate it until needed. Makes 1½ cups and keeps two months or longer in the refrigerator.