Start by mixing softened mascarpone with granulated sugar and vanilla extract in a bowl, whisking until smooth and creamy.
Add sliced strawberries into the mascarpone mixture and gently fold them in, allowing the fruit to release some juice for extra flavor.
Lay a slice of bread or sponge cake on a serving plate as the base layer.
Spread a generous layer of the mascarpone and strawberry mixture over the cake, smoothing it into an even layer.
Add another layer of bread or sponge cake on top of the first, pressing gently to adhere.
Spread the remaining mascarpone mixture over the second layer, spreading it smoothly and evenly.
Decorate the top with extra sliced strawberries or whole berries for an inviting presentation.
Refrigerate the cake for at least 15 minutes to let the flavors meld and the mascarpone set slightly.
Slice and serve the cake chilled, enjoying the creamy texture with fresh, juicy strawberries.