Preheat oven to 325°F (162°C). Line a muffin tin with cupcake liners.
In a bowl, combine vanilla wafer crumbs, sugar, and melted butter. Distribute evenly among the liners and press down to form a crust.
Bake the crusts for 5 minutes. Remove from oven and let cool while preparing the filling.
Reduce oven temperature to 300°F (148°C).
In a small saucepan, combine champagne and cornstarch. Heat over medium heat for 10-15 minutes, until reduced by half to 0.5 cup. Set aside to cool.
In a large bowl, beat cream cheese, sugar, and flour on low speed until combined. Scrape down the sides.
Add sour cream and vanilla extract. Beat until combined. Stir in the cooled champagne reduction.
Add eggs one at a time, beating slowly after each addition and scraping the bowl.
Divide chopped strawberries among the cheesecake crusts.
Pour the cheesecake filling into each cup, filling almost to the top.
Bake for 20-23 minutes. Turn off the oven, leave the door closed for 5 minutes.
Crack the oven door open and let cheesecakes cool for 15-20 minutes. Then, transfer to the refrigerator to finish cooling. Once cooled, remove from the pan.
While cheesecakes cool, prepare the topping. In a saucepan, combine champagne and cornstarch, whisking well. Stir in strawberry puree.
Heat the champagne mixture over medium heat for 10-15 minutes, until reduced by half to 0.5 cup. Set aside to cool.
In a large bowl, combine heavy whipping cream, powdered sugar, cooled champagne mixture, and red food coloring. Whip on high speed until stiff peaks form.
Pipe swirls of whipped cream onto each cheesecake.
Add sprinkles if desired. Refrigerate until ready to serve.
Notes
These mini cheesecakes are best served chilled. They can be made a day in advance and stored in the refrigerator.