Combine the gin, limoncello, lemon juice, and mint leaves in a cocktail shaker with ice.
Shake well for about 30 seconds or until chilled.
Strain into chilled martini glasses and garnish as desired.
Serve immediately.
Recipe Note
Amalfi is a variety of lemon that grows in Amalfi on the coast of Italy. Because Amalfi may be hard to find for some people, you may still use anything of good quality that comes in hand.