In a food processor, pulse the vanilla cookies until they form very fine crumbs. Mix with melted butter and sugar until well combined. Press the mixture firmly onto the bottom and up the sides of a 9-inch tart pan, springform pan, or pie pan. Chill in the refrigerator for at least 20 minutes to set while preparing the filling.
8 oz vanilla cookies, 6 tbsp butter, 1 tbsp powdered sugar
In a large mixing bowl, soften the room-temperature cream cheese with a hand mixer or stand mixer until smooth. Add the powdered sugar, fresh lemon juice, and lemon zest until smooth and creamy. In a separate bowl, whip the cream until stiff peaks form. Gently fold the whipped cream into the cream cheese mixture until well combined.
16 oz cream cheese, 2/3 cup powdered sugar, 4 tbsp lemon juice, 1 tsp lemon zest, 3/4 cup heavy cream
Spread the cream cheese mixture evenly over the chilled crust.
Cover the tart with plastic wrap and refrigerate for at least 3 hours, or until set.
Meanwhile, in a large bowl, add the remaining tablespoon of sugar, 1 tsp lemon juice to the fresh blueberries. Mix, cover, and set aside to macerate.
2 cups fresh blueberries, 1 tbsp powdered sugar, 1 tbsp lemon juice
Add the macerated berries on top of the creamy cream cheese layer just before serving.
Slice and serve immediately chilled with a dusting of powdered sugar, a dollop of cool whip or homemade schlag.