01 - Combine crushed cookies and melted butter in a bowl. Press the mixture firmly into the bottom of a 9x13 inch dish. Chill in the refrigerator while preparing the next layer.
02 - Combine blueberries, sugar, lemon juice, and water in a saucepan. Cook over medium heat until berries burst. Mix cornstarch with a splash of water to form a slurry, then stir into the berry mixture. Simmer until thickened, about 2 minutes. Cool completely.
03 - Beat cream cheese with powdered sugar until smooth. Add lemon zest and juice, and mix well. In a separate bowl, whip the heavy cream to stiff peaks. Gently fold whipped cream into the lemon mixture until just combined.
04 - Spread half of the lemon cream over the chilled cookie crust. Gently spread half the blueberry sauce over the cream layer. Repeat with the remaining lemon cream and blueberry sauce.
05 - Cover and refrigerate for at least 4 hours, or overnight for best results.
06 - Before serving, spread with whipped cream and garnish with fresh blueberries and lemon zest.