Chill the glass

• Fill the martini glass with ice cubes and water.
• Let it sit so the glass gets frosty.

Rinse the glass with vermouth

• Pour the dry vermouth into the chilled glass and swirl it around.
• Discard the vermouth, keeping just the coating in the glass.

Muddle the olive

• Place an olive in the cocktail shaker and muddle it to release its flavor.

Build the cocktail

• Add the tequila, olive brine and ice to the shaker.
• Shake until well chilled.

Strain and serve

• Strain the cocktail through a mesh strainer into the chilled martini glass.
• Garnish with the remaining olives.