Grapefruit-tini

Directions

1. 1
   Make simple syrup: In a small saucepan, mix the sugar with 1 cup water.
2. 2
   Simmer over low heat until sugar dissolves.
3. 3
   Set aside to cool, about 5 minutes.
4. 4
   In a large shaker, combine the grapefruit juice, vodka and 1 tablespoon simple syrup.
5. 5
   (Remaining syrup can be refrigerated for up to 1 week.)
6. 6
   Add ice cubes and shake well.
7. 7
   Strain into martini glass, and float (do not mix) prosecco in glass.