Use this syrup to make our Cucumber-Ginger Fizzes.
Put sugar and 1 cup water into a medium saucepan. Bring to a boil over medium-high heat, stirring to dissolve sugar. Add ginger; bring to a simmer. Remove from heat, and let stand 30 minutes. Pour syrup through a fine sieve into an airtight container; discard ginger.
Syrup can be refrigerated up to 1 month.