Ingredient: sugarWhat it is: Additive
Ingredient: limeWhat it is: Fruit
A number of different fruits (generally citruses), both species and hybrids, which have their origin in the Himalayan region of India, and which are typically round, green to yellow in color, 3–6 cm in diameter, generally containing sour and acidic pulp.
Ingredient: mintAlso Known As: peppermint, spearmint What it is: Herb
Ingredient: rumWhat it is: Rum
Ingredient: seltzer waterAlso Known As: soda water, sparkling water, fizzy water What it is: Additive
In a Collins glass, muddle the lime juice with the sugar, and mint and lightly crush. Fill the glass about two-thirds with ice, add rum, drop in the lime shell and top off with seltzer or club soda. Stir.
Simple syrup could be used instead of sugar. Some also like adding a couple dashes of Angostura bitters.