You can substitute in the recipe below either: cointreau, midori, or pineapple
juice for the half and half. And reduce the Vanilla vodka to 1 oz.
http://www.barnonedrinks.com/recipes/cocktails/k/keylimemartini.html
Key Lime Martini
2 oz. Stolichnaya Vanilla Vodka
1 oz. Rose's Lime Juice
1 oz. Half and Half Cream
Shake with ice and strain into a chilled martini glass. Serve with a lime
twist.
-------------------http://www.tuscansteak.com/miami/drink.htm
KEY LIME MARTINI
Crystal Vodka and Key Lime Liquor shaken
with a splash of Sour Mix
-------------------
Key Lime Martini
1 oz. Stolichnaya Vanilla Vodka
1 oz. Rose's Lime Juice
1 oz. Half and Half
1 oz Cointreau
Shake with ice and strain into a chilled martini glass. Serve with a lime
twist.
---------------http://www.sfweekly.com/issues/2001-02-28/eat.html
Key lime martini, a sweet, tangy, buttery blend of cointreau, lime, pineapple
juice, and vanilla Stoli that tastes remarkably like Key lime pie.