Pour all the ingredients in the glass section of a Boston shaker. Fill with cubed ice and shake hard to a slow count of ten (or to the count of the first line of "Girl from Ipanema"). Strain into a chilled martini glass. Flame an orange peel over the surface of the drink and drop it into the glass.
This was my second-place prize in the Cardenal Mendoza cocktail contest. (My former employee at the Rainbow Room, Jeff Becker, won first. That didn't hurt so bad; I trained him.)