Making the Strawberry Base:

1. Macerate the Strawberries: In a large bowl, combine the sliced fresh strawberries and granulated sugar. Gently toss the strawberries and sugar together to ensure all the strawberries are coated.
2. Let the Strawberries Rest: Cover the bowl with plastic wrap or a lid and let the strawberries macerate at room temperature for at least 1 hour, or up to 2-3 hours. Maceration draws out the juices from the strawberries and creates a delicious, syrupy base. You’ll notice the strawberries become softer and release a beautiful, fragrant liquid. Stir occasionally during maceration.
3. Strain the Strawberry Syrup: After maceration, strain the strawberry mixture through a fine-mesh sieve into a pitcher or large bowl. Press gently on the solids with a spoon to extract as much syrup as possible, but don’t force it too much, as you want a clear syrup. Discard the strawberry solids (or save them to use in smoothies or as a topping for yogurt or ice cream!). You should have a vibrant, ruby-red strawberry syrup.
4. Make a Simple Syrup (Optional, but Recommended for Deeper Flavor): While the macerated strawberry syrup is flavorful on its own, briefly cooking it as a simple syrup can deepen the strawberry flavor and create a smoother, more stable base. In a small saucepan, combine the strained strawberry syrup with 1/2 cup of water. Heat over medium heat, stirring occasionally, until the sugar is fully dissolved and the syrup is just beginning to simmer. Do not boil. Remove from heat and let cool completely. This step is especially beneficial if you plan to make the punch base ahead of time.
5. Add Lemon Juice: Once the strawberry syrup (whether cooked or uncooked) has cooled completely, stir in the fresh lemon juice. This brightens the flavor and balances the sweetness.

Assembling the Sparkling Party Punch:

1. Chill the Syrup Base: If you made the simple syrup version, ensure it is thoroughly chilled before proceeding. You can refrigerate it for several hours or even overnight. Chilling the base ensures the punch stays cold and refreshing when you add the sparkling components.
2. Combine Ingredients in a Punch Bowl: Just before serving, pour the chilled strawberry syrup base into a large punch bowl or beverage dispenser.
3. Add Sparkling Wine/Prosecco/Champagne: Gently pour in the chilled sparkling wine, Prosecco, or Champagne. Add it slowly to minimize excessive fizzing.
4. Add Lemon-Lime Soda: Pour in the chilled lemon-lime soda. Again, add it gently to maintain the bubbles.
5. Add Strawberry Liqueur (Optional): If using strawberry liqueur, add it now and stir gently to combine.
6. Add Ice: Add ice to the punch bowl. You can use regular ice cubes, a large ice ring (which melts slower and dilutes the punch less), or fruit-infused ice cubes (see tips section). Add ice just before serving to prevent excessive dilution as it melts.
7. Garnish and Serve: Garnish the punch with fresh strawberry slices, lemon slices, mint sprigs, edible flowers, or any other desired garnishes. Serve immediately and enjoy the sparkling delight!