Sprinkle salt on a small plate or in a shallow bowl. Lightly wet the rim of a highball glass with a moistened paper towel. Dip the rim in salt to coat. Pour vodka and grapefruit juice into the prepared glass. Add ice and stir to combine.
So simple and so delicious! I used 1/2 grapefruit soda and half fresh squeezed grapefruit. Delicious! Of course, I like sour and salty. Sometimes I have friends that add a little bit of sple...