Though the bellini is often thought of as a mimosa alternative, it's actually an Italian tradition dating back hundreds of years! The original uses white peaches, but feel free to swap the fruit with whatever looks best at your farmer's market.
Make the peach purée. Blend the chopped peaches until smooth, about 45 seconds.
Make the cocktail. Portion the peach purée between 6 glasses (about 1/4 cup of purée per glass). Top each with chilled Prosecco. Stir gently to combine.
Serve. Garnish with a peach slice (if desired) and serve immediately.