1 ounce Campari
1 1/4 ounce sweet vermouth
2 ounces champagne
Garnish: Two Lemon twists (coat/cover)
Shake Campari and sweet vermouth with ice. Strain into a cocktail glass and top with champagne.
Source: Audrey Saunders
Use one lemon twist to coat the glass before adding the drink, and the second one on top of the drink before rimming the edge off the glass with the peel.