Fresh grapefruit and lime juice are combined with tequila and sweetened with agave for this breezy cocktail from the author of Everyday Chic, supermodel Molly Sims.
Pour Tajin or salt onto a small plate. Run a grapefruit wedge around the rim of a glass and dip into the seasoning or salt to coat the rim.
In the glass or a cocktail shaker, combine the tequila, lime juice, club soda, agave, and grapefruit juice. Stir or shake to combine. Sweeten to taste with more agave, if desired. If using a cocktail shaker, strain into the prepared glass. Garnish with a grapefruit wedge and the rosemary sprig.
Always drink responsibly.