Winter Sour

Strip the leaves from the rosemary sprig and place them in the base of a shaker, then lightly muddle to release their aroma.

Add the Meyer lemon juice and egg white, and dry shake to emulsify the mixture.

Incorporate the Campari and honey syrup, then add ice and shake vigorously until well-chilled.

Double strain the mixture into a chilled martini glass.

Garnish with a fresh sprig of rosemary to complete the presentation.