Add the peaches, sugar, lemon juice and 1/3 cup very cold water to a blender. Puree until smooth, about 1 minute.
Add 1 ounce of the peach puree to the bottom of a champagne glass. Top off the glass with Prosecco. Serve immediately.
Gabriele shares his family recipe for a delicious summertime libation.
Sizzling Summer Sides