Sprinkle some coarse grain or sea salt on to a plate.
Rub the rim of each glass with a slice of lime.
Dip each glass rim in the salt.
Fill both glasses with ice.
Add 1-1/2 ounces of vodka (or lemon-lime soda) to each glass.
Add the lime juice.
Top the glass with grapefruit juice.
Add 2-4 slices of jalapenos and a slice of lime.
Garnish with a fresh mint leaf.