1 part Campari
2-3 parts dry sparkling Italian white wine (preferably Pignoletto frizzante, never prosecco)
Half an orange slice to garnish
Club soda (optional)
To a large, balloon-style wineglass, add the Campari and the wine. Garnish with a half slice of orange. In warm weather, feel free to add ice and club soda. if you do add club soda add more campari.