Sgroppino serves 2 1/2 pint lemon sorbet 4-6 ice cubes 4 ounces vodka 1 cup Prosecco zest of 1 lemon 1. Place the sorbet, ice cubes, vodka and Prosecco in a blender and whirl until thick, creamy and barely pourable. 2. Transfer it to iced champagne glasses, sprinkle with lemon zest (to taste) and serve with small spoons.