"The bitch is dead" -- this is what James Bond icily utters when he learns of the death of Vesper Lynd, the woman who broke his heart. In Casino Royale (both the novel and the movie starring Daniel Craig), Bond falls in love with Vesper before he learns she is a double agent. All of this happens after he creates a cocktail in her honor.

3 ounces gin
1 ounce vodka
.5 ounces Lillet Blanc

Combine in a shaker with ice, shake with the fury of Bond exacting vengeance, and strain into a chilled glass. Lemon peel garnish.

Bond’s original creation is not far removed from a Martini, either the original or his version. Bond's Vesper calls for “three measures of Gordon’s, one of vodka, half a measure of Kina Lillet.” Gordon’s was and is a popular gin. Use whatever gin you prefer or have on hand.  Kina Lillet was a French aperitif wine.  It no longer exists under that name, but with a new formula it’s now known as Lillet Blanc. As you would with vermouth, make sure the Lillet Blanc is fresh and keep it in the fridge. If you can't find Lillet Blanc, dry vermouth is a good substitute. Bond never specifies the vodka brand, which amuses me because in popular culture he forever will be associated with vodka. If you or your guest is not a fan of gin (like I once was), adjust the ratios of gin and vodka.

The Vesper is a big cocktail because it contains four ounces of high proof alcohol.  Go Bond or go home.