In a medium bowl, combine the sliced strawberries and granulated sugar. Toss gently and set aside for about 30 minutes to allow the strawberries to release their juices.
In a separate large bowl, whip the heavy cream, powdered sugar, and vanilla extract together until stiff peaks form using an electric mixer. This should take about 3-5 minutes.
In an 8-inch square baking dish or a similar-sized container, start with a layer of the whipped cream mixture at the bottom.
Place a layer of shortcakes or ladyfingers on top of the whipped cream, slightly overlapping if necessary.
Spoon some of the macerated strawberries (including their juices) on top of the shortcakes, spreading them evenly.
Repeat layers, alternating between whipped cream, shortcakes, and strawberries, until you reach the top of the dish or run out of ingredients. Ensure the last layer is whipped cream topped with a generous amount of strawberries.
Cover the dish with plastic wrap and refrigerate for at least 4 hours, or overnight if possible, to allow the layers to set and the flavors to meld together.
When ready to serve, remove from the refrigerator, garnish with fresh mint leaves, and cut into squares or slices to serve.
Notes
Serve chilled slices on individual plates, drizzled with any remaining strawberry juices, and topped with a dollop of whipped cream and a sprig of mint for a fresh, colorful finish.