1 1/4 cups sugar
2/3 cup fresh lemon juice (from about 3 lemons)
3 pounds frozen pitted sour cherries, partially thawed with juices
1 cup fresh basil leaves, plus more for serving
2 to 3 cups vodka
6 cups sparkling water
Bring sugar and 1 1/4 cups water to a boil in a small saucepan, stirring until sugar is dissolved, 3 minutes. Remove from heat; let cool 15 minutes. Syrup can be refrigerated for u...