Cut the lime in half.

Squeeze all of the lime juice over ice (preferably shaved or crushed ice) in a double old-fashioned glass.

Save the lime rind for garnish.

Add the remaining ingredients with the light rum poured in first and the dark rum poured in second.

If necessary, fill the glass with more ice.

Decorate the cocktail with the lime rind, fresh mint leaves, fresh fruit on a stick, and if possible, a colorful little paper umbrella and an orchid!