01 - Combine graham cracker crumbs, melted butter, 2 tbsp sugar, and lemon zest in a medium bowl. Mix until well blended and press firmly into the bottom of a 9-inch springform pan. Refrigerate while preparing the filling.
02 - Beat cream cheese and sugar in a large bowl until smooth and creamy. Add lemon juice, lemon zest, and vanilla extract. Mix until fully incorporated.
03 - Whip cold heavy cream in a separate bowl until stiff peaks form. Gently fold whipped cream into the cream cheese mixture until no streaks remain.
04 - Carefully fold in 1 2/3 cups fresh blueberries, taking care not to crush the berries. Maintain a light, airy texture.
05 - Pour the filling over the chilled crust. Smooth the top with a spatula for an even surface.
06 - Cover and refrigerate for at least 4 hours, or until the filling is completely set and firm.
07 - Remove cake from springform pan. Top with remaining blueberries, sprinkle with lemon zest, and add whipped cream if desired. Slice and serve chilled.