1-1/2 ounces 100% agave blanco tequila
1 ounce fresh lime juice
1/2 ounce grenadine or crème de cassis
Ginger beer or ginger ale
Combine first three ingredients in a cocktail shaker with plenty of ice. Shake or stir, then strain into an ice-filled collins glass.
Top with ginger beer and stir gently to combine. Garnish with a lime wheel.