Just in time for your Cinco de Mayo celebrations this weekend.....
Wet the rims of 4 glasses and coat with coarse salt [if desired]; fill the glasses with ice.
Pour 1 ounce tequila and 1/2 ounce liqueur into each.
Top each with 3/4 cup grapefruit juice and stir.
Garnish with a slice of grapefruit.
Enjoy + have a great weekend!