01 -
Add halved kumquats and thyme to a shaker. Muddle gently to release juices and oils.
02 -
Pour in the simple syrup and fresh lemon juice.
03 -
Fill the shaker with ice and shake for about 10 seconds.
04 -
Strain the mixture into a glass filled with fresh ice.
05 -
Top with chilled sparkling water and stir lightly.
06 -
Garnish with a sprig of thyme and mint leaves, if using. Serve immediately.