01 - Combine crushed cookies with melted butter in a bowl, mixing until evenly coated. Press the mixture firmly into the bottom of a 9x13 inch dish. Refrigerate while preparing the remaining layers.
02 - Add blueberries, granulated sugar, lemon juice, and water to a saucepan. Cook over medium heat until the berries begin to burst. Whisk cornstarch with a small splash of water to form a slurry, then stir into the berry mixture. Simmer until thickened, about 2 minutes. Remove from heat and cool completely.
03 - Beat cream cheese with powdered sugar in a large bowl until smooth and lump-free. Incorporate lemon zest and lemon juice, mixing until well blended. In a separate bowl, whip cold heavy cream to stiff peaks. Gently fold the whipped cream into the lemon mixture until just combined, being careful not to deflate the volume.
04 - Spread half of the lemon cream evenly over the chilled cookie crust. Dollop half of the cooled blueberry sauce over the cream and spread gently. Repeat with the remaining lemon cream followed by the remaining blueberry sauce, creating distinct visible layers.
05 - Cover the dish tightly with plastic wrap and refrigerate for at least 4 hours, or overnight for the cleanest slices and best flavor development.
06 - Spread whipped cream over the top layer just before serving. Finish with a scattering of fresh blueberries and a light dusting of lemon zest.