Mystic Monk

Chill a martini glass by filling it with ice water; set aside.

Into a cocktail shaker, combine the gin, herbal liqueur (Green Chartreuse), freshly squeezed lime juice, dry vermouth, elderflower liqueur (St. Germain), and blue curaçao. For a touch of sweetness and balance, consider adding a splash of simple syrup.

Fill the shaker with ice, then shake vigorously until well-chilled.

Empty the ice water from the martini glass and strain the cocktail into the glass.

For an optional garnish, twist a lemon peel over the drink to release its oils, then drop it into the glass.