Watermelon Rosemary Gin Fizz

To make rosemary simple syrup: Add ¼ cup sugar, ¼ cup water, and 1 tbsp fresh rosemary to a pot. Bring to a boil, and stir until sugar is dissolved. Let simmer for 1 minute, then remove from heat. Let rosemary steep for 30 minutes.

To make the cocktail:

1. Add gin, WTRMLN WTR, simple syrup, bitters, and egg white to a cocktail shaker. Shake vigorously for at least 15 seconds to get the egg white foamy. Then add in 3-4 ice cubes, and shake until chilled.
2. Strain into a glass, top with soda water, and garnish with orange peel and rosemary.