Fill a highball glass to the top with ice cubes
Place 5 egg quail egg yolks into a shaker
Pour in 0.5 oz of lemon juice, 0.75 oz of sugar syrup and 2 oz of gin
Fill the shaker with ice cubes and shake thoroughly
Strain into the highball glass
Top up with club soda and stir gently
Garnish with lemon zest