Marie Rose

Select and pre-chill a Martini glass.

Prepare a garnish by setting aside a rosemary sprig.

Strip the leaves from the rosemary and muddle them with the green grapes at the base of a shaker.

Add the gin, elderflower liqueur, and freshly squeezed lime juice.

Shake the mixture with ice until well chilled.

Fine strain the cocktail into the pre-chilled Martini glass.

Garnish with the reserved rosemary sprig.