Refreshing and analcoholic: The rosemary grapefruit spritz

Due to the beautiful weather outside I want to share the recipe for this refreshing analcoholic drink:

25ml sugarsirup (or 1-2 tablespoons regular sugar)
1 sprig rosemary
1 Grapefruit
squeeze the grapefruit and put the juice, sugar and rosemary into your shaker. Fill up with Ice and shake until has dissolved. Strain into your glass, fill up with ice and top with Soda or Tonic.
If you want to „booze“ it up, add 1 shot of Gin