Shake, strain, rocks, garnish with Campari
Campari is optional, and it's more of a "sink" than a "float"
Not a lot of grappa cocktails on here, so I did some searching and found the "Valery" cocktail. It was way too sweet and didn't really work out, but I persisted. Added lemon and bitters, increased juice and additional fiddling. The name "Valou" was the nickname for my old French girlfriend Valérie, and this is the kind of thing she would have liked.