1 - Pour the vodka, dry vermouth and olive brine into a cocktail shaker with a handful of ice and shake well.

2 - Rub the rim of a martini glass with the wedge of lemon.

3 - Strain the contents of the cocktail shaker into the glass and add the olive.

4 - A dirty Martini contains a splash of olive brine or olive juice and is typically garnished with an olive.