1. Pour all ingredients into a shaker, except the tonic water.
2. Add ice and shake vigorously for 10 seconds.
3. Filter into a glass filled with ice.
4. Top with tonic water.
5. Garnish with fresh chamomile flowers.

* RHUBARB SYRUP:

250 ml Water
250 g Sugar
1 Rhubarb, diced

Steps :
1. Bring water to a boil, then reduce heat.
2. Add sugar and rhubarb to the pot.
3. Stir with a spoon to completely dissolve sugar.
4. Let rhubarb infuse for 7 to 9 minutes.
5. Let cool, then strain into a sterilized jar. Cover and refrigerate.