2 ounces tequila
3 ounces fresh squeezed grapefruit juice
1 splash Cointreau
two lime wedges
Run the center of one lime wedge around the rim of a highball glass. Dip in a dish filled with salt and fill the glass with ice.
Fill a cocktail shaker with ice and pour in tequila, juice, and Cointreau. Shake well. Strain into prepared highball glass and squeeze remaining lime on top.