Step 1

Cut a notch in the grapefruit wedge, then run the grapefruit around the rim of a glass. Dip the edge of the rim into a plate of flaky sea salt.

Step 2

To the glass, add the tequila, lime juice, grapefruit juice, and simple syrup and stir until combined.

Step 3

Fill the glass with ice (clear ice if you want to get fancy!). Top with soda water and serve!