In a medium bowl, combine the sliced strawberries and granulated sugar. Stir gently and set aside for about 15 minutes to allow the strawberries to macerate and release their juices.
In a separate bowl, whip the heavy cream until soft peaks form.
Add the mascarpone cheese and vanilla extract to the whipped cream, then gently fold until fully incorporated and smooth.
Lay a layer of ladyfinger cookies in the bottom of a 9x9 inch baking dish or a similar-sized container.
Spoon half of the mascarpone mixture over the ladyfingers, spreading it evenly.
Layer half of the macerated strawberries over the mascarpone mixture.
Repeat the layers with the remaining ladyfingers, mascarpone mixture, and strawberries.
Cover the dish with plastic wrap and refrigerate for at least 4 hours or overnight to allow the flavors to meld and the cookies to soften.
Before serving, garnish with fresh mint leaves for a pop of color and added freshness.