01 - Whip the heavy cream with powdered sugar and vanilla extract in a mixing bowl until stiff peaks form. Set aside.
02 - Toss blueberries with granulated sugar if desired and let macerate for 10 minutes to enhance natural sweetness.
03 - Arrange half of the cake cubes evenly in the bottom of a trifle dish or large glass bowl.
04 - Spoon half of the lemon curd over the cake cubes, spreading evenly.
05 - Scatter half of the blueberries over the lemon curd layer.
06 - Spread half of the whipped cream over the blueberries, creating an even layer.
07 - Layer remaining cake cubes, lemon curd, blueberries, and whipped cream in the same order.
08 - Sprinkle lemon zest over the top and add a few extra blueberries for visual appeal.
09 - Refrigerate for at least 1 hour before serving to allow flavors to meld and achieve optimal texture.