1
Select and pre-chill a HIGHBALL (MAX 10OZ/300ML) GLASS.
2
Prepare garnish of quarter lemon slice wheel.
3
SHAKE first 5 ingredients with ice and strain back into the shaker.
4
DRY SHAKE (without ice) to emulsify.
5
Slowly POUR 2/3rds of the shaker's contents from a higher-than-normal height into chilled glass (no ice in the glass) while simultaneously pouring soda with your other hand. The cocktail and soda should form a single stream of liquid falling into the glass.
6
As when pouring Guinness, to achieve a perfect head on a fizz, the cocktail should be left to settle for at least a minute before topping off with what remains in the shaker. Ideally, during the settling period, the glass should be placed in a glass froster/fridge/freezer. As the final contents of the shaker are poured into the glass, the head should rise like a souffle.
7
Garnish with quarter lemon wheel on rim.