Mojito [1]
From Taste of Cuba [2]

1 teaspoon sugar
Juice from 1 lime (2 ounces)
4 mint leaves
1 sprig of mint
Havana Club white Rum (2 ounces)
2 ounces club soda

1. Place the mint leaves into a long mojito glass (often called a "collins" glass) and squeeze the juice from a cut lime over it. You'll want about two ounces of lime juice, so it may not require all of the juice from a single lime or may require another lime.
2. Add the sugar, then gently smash the mint into the lime juice and sugar with a muddler [3] (you can also use the back of a fork or spoon if one isn't available).
3. Add ice (preferably crushed) then add the rum and stir, and top off with the club soda.
4. Garnish with a mint sprig.

Serves 1.