Cool a Martini cup. Put all the ingredients in the shaker with some ice cubes and stir for 10 seconds. Remove the ice from the cup, pour the filtered cocktail and let yourself be hypnotized by the opalescent colour of this nectar. Take the lemon zest between your fingers and crush it over the Vesper Martini, perfuming it with the essential oils of the lemon, which release a wonderful breath of freshness.
Vesper is a great, fantastic cocktail, a variation of the Martini cocktail invented by the writer Ian Fleming in the 1953 novel Casino Royale, where the legendary James Bond wants it shaken, not stirred.