Chill a martini glass in the freezer or add ice and water to get it "very" cold.
Put ice in a cocktail shaker. Pour 2 ozs. of vodka or gin in the shaker with 3/4 oz. Boscoli Dirty Martini Olive Juice (or other olive juice). Shake until slushy.
Empty ice and water from glass if this is the way you chilled it. Add the dry vermouth and turn glass to coat the inside with the vermouth. Pour out any extra vermouth.
Pour the mixture in the shaker through a strainer into the glass.
More or less olive juice can be used - to taste.
Recipe courtesy of Denise - Razoos Cajun Cafe' - Bedford, TX.