Strawberry Layer

Combine the chopped strawberries and granulated sugar in a medium bowl. Stir well and set aside for at least 10 minutes.

Gently smash the strawberries with a fork.

Add the strawberry pie filling and stir until fully combined. Set aside.

Mascarpone Layer

In a large bowl or stand mixer, beat the heavy whipping cream and vanilla extract until frothy, about 2–3 minutes.

Gradually add the powdered sugar and instant pudding mix. Continue beating until stiff peaks form, about 3–4 minutes.

Add half of the mascarpone cheese and beat until smooth.

Add the remaining mascarpone cheese and mix until completely smooth and creamy, about 3–4 minutes.

Assembly

Lightly spray a 9-inch square baking dish with nonstick spray.

Dip ladyfingers into the strawberry mixture, turning to coat, and arrange them in a single layer in the dish.

Spoon half of the strawberry mixture over the ladyfingers.

Spread half of the mascarpone mixture evenly over the strawberry layer.

Repeat the layers: ladyfingers, strawberry mixture, and remaining mascarpone mixture.

Cover with plastic wrap and refrigerate for at least 6 hours or overnight.

Before serving, garnish with sliced strawberries, whipped cream, and a dusting of powdered sugar. Slice and serve.