Pour Farmat Hay, lemon juice, sugar syrup, and egg white into a cocktail shaker.

​

Shake vigorously without ice to build a light foam.

​

Add ice and shake again until the drink is thoroughly chilled.

​

Prepare a cocktail glass with fresh ice cubes.

​

Strain the mixture into the glass.

​

Top with tonic water.

​

Decorate as desired and serve.