01 - Combine crushed cookies with melted butter in a bowl. 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 medium saucepan. Cook over medium heat until berries burst. Dissolve cornstarch in a splash of water to form a slurry, then stir into the berry mixture. Simmer until thickened, about 2 minutes. Allow to cool completely.
03 - Beat cream cheese with powdered sugar until smooth. Incorporate lemon zest and juice, mixing thoroughly. In a separate bowl, whip cold heavy cream to stiff peaks. Gently fold the 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. Repeat with the remaining lemon cream and blueberry sauce to complete the layers.
05 - Cover the dish and refrigerate for at least 4 hours, or overnight for optimal texture and flavor development.
06 - Spread whipped cream over the top before serving. Garnish with fresh blueberries and a sprinkle of lemon zest.