Prep Glass: Fill a Highball glass (or champagne flute) with ice cubes. Give it a stir to chill it and set it aside.
Add Egg White (optional): Crack open 1 egg white, separate white from yolk and pour the white into the shaker. Discard the yolk.
Add Simple Syrup: Add ¾ oz simple syrup.
Add Lime Juice: Measure and pour 1 oz lime juice into the shaker.
Add Tequila: Pour 2 oz Tequila of your choice into the shaker.
Shake Well: Fill the shaker with ice. Close it well and shake the ingredients vigorously for about 15 seconds.
Dry Shake (only if using egg white): Open the shaker. Using the cocktail strainer, pour the liquid in the other tin and discard the ice. Close the shaker again and shake another time, for 15-20 seconds, without ice this time.
Strain: Take the Highball glass and discard the ice inside. Using both the cocktail strainer and the fine strainer, strain the drink from the shaker into the chilled glass.
Add Club Soda: Let the cocktail rest for a few seconds and top up with 1 oz club soda. The foam should rise slightly above the top of the glass.
Garnish: Garnish with a lime wheel on the rim of the glass or with a lime peel (express the lime zest on top of the drink and place it on the rim of the glass) and serve immediately.