Ingredients:
- Fresh grapefruit juice
- Vodka
- Simple syrup
- Lemon juice
- Egg white
- Grenadine
- Soda water
Instructions:
- Cut the grapefruit in half and squeeze the juice into a mixing bowl.
- Add the vodka, simple syrup, lemon juice, and egg white to the bowl and mix until well combined.
- Strain the mixture through a fine-mesh sieve into a cocktail shaker.
- Add ice to the shaker and shake vigorously for about 15-20 seconds.
- Strain the mixture into a chilled glass filled with ice.
- Top the cocktail with grenadine and stir gently.
- Top the cocktail with soda water and stir again.
- Garnish with a slice of grapefruit and serve immediately.