The name of this drink, and the Italian limoncello, Fernet-Branca and Prosecco in it, are references to Boston's historically Italian North End neighborhood.
Rinse a chilled flute with the Fernet-Branca and pour it out. Fill a cocktail shaker with ice. Add the limoncello and lemon juice and shake well. Strain into the flute and top with the Prosecco.