Negroni sbagliato

For ➊ drink
6 cl spumante (or prosecco / champagne/ white chardonnay)
3 cl sweet vermouth
3 cl Campari
1 slice orange for garnish

Stir well over ice in a balloon-size wine glass.
Garnish with a slice of orange.
Made by mistake (sbagliato) in a Milano bar: instead of gin , use spumante. Or prosecco. Or champagne. Or white wine.