01 - Combine crushed cookies and melted butter in a bowl, then press firmly into the bottom of a 9x13 inch dish. Refrigerate while preparing the next layer.
02 - Combine blueberries, sugar, lemon juice, and water in a saucepan over medium heat until berries burst. Whisk cornstarch with a splash of water into a slurry, stir into the berry mixture, and simmer until thickened, about 2 minutes. Allow to cool completely.
03 - Beat cream cheese with powdered sugar until smooth. Incorporate lemon zest and juice and mix until uniform. In a separate bowl, whip heavy cream to stiff peaks, then gently fold into the lemon mixture until just combined.
04 - Spread half the lemon cream over the chilled cookie crust. Spoon half the blueberry sauce over the cream. Repeat with the remaining lemon cream and blueberry sauce.
05 - Cover and refrigerate for at least 4 hours, or overnight for optimal texture and flavor development.
06 - Spread whipped cream over the top and garnish with fresh blueberries and lemon zest before slicing and serving.