Strawberries and sparkling wine are a classic combination. Here, vodka and lemon juice provide a bracing, bright background to yield something just right for a casual daytime event, especially one that might linger until the sun goes down.
Up to 2 hours prior, combine lemon juice, simple syrup and strawberries in blender, and purée until cohesive. Add vodka and bitters, and store in refrigerator.
To serve, stir well, and pour into punchbowl over large ice cubes. Top with sparkling wine. Garnish with lemon wheels. Serves 15–20.