1½ oz tequila1 oz red grapefruit juice¾ oz lime juice½ oz agave syrup2 dashes grapefruit bitterssoda water
instructions :
Add all the ingredients except soda water to a cocktail shaker. Add ice and shake until chilled.
Strain into a Collins glass over ice and top with soda water.
Garnish with a half wheel of grapefruit.
source :
punchdrink.com