You can reach for all Italian bottles to make this festive, effervescent punch: prosecco, Campari, and Cocchi Americano. Mix with freshly squeezed grapefruit juice and rounds of your favorite citrus--we used grapefruit, orange, and Meyer lemon.
In a punch bowl, stir together grapefruit juice, Cocchi Americano, and Campari. Add prosecco, then citrus wheels and ice. Serve, topped with seltzer.
Cocchi Americano is an Italian fortified wine; Lillet Blanc is a fine substitute.