Peel and seed melons and chop into 2-inch chunks. Place the melon and lime juice in blender or food processor and blend until smooth. Add pinch of salt, to taste. Chill until ready to serve. Pour mixture half way into champagne flutes. Fill the rest of the glass with Champagne or Prosecco. Drop a few blueberries into the glass.
Recipe courtesy of Michael Chiarello, 2007