01 - In a chilled mixing bowl, whip the heavy cream with powdered sugar and vanilla extract using an electric mixer or hand whisk until stiff peaks form. Refrigerate until ready to assemble.
02 - Toss fresh blueberries with granulated sugar in a small bowl if desired, allowing them to macerate for 10 minutes to release natural juices.
03 - Arrange half of the cubed cake in an even layer at the bottom of a trifle dish or large glass bowl, pressing gently to create a stable base.
04 - Spread half of the lemon curd evenly over the cake cubes using a spatula, ensuring complete coverage for optimal flavor distribution.
05 - Scatter half of the blueberries over the lemon curd layer, distributing them evenly for consistent fruit in every serving.
06 - Spread half of the prepared whipped cream over the blueberries, creating a smooth layer that seals the fruit beneath.
07 - Layer the remaining cake cubes, followed by the remaining lemon curd, blueberries, and whipped cream, repeating the sequence to create distinct visual layers.
08 - Finish by sprinkling fresh lemon zest over the top layer and adding a few extra blueberries for visual appeal.
09 - Refrigerate the assembled trifle for at least 1 hour before serving to allow flavors to meld and cake to soften slightly. Serve chilled.