01 - Combine graham cracker crumbs, melted butter, 2 tablespoons sugar, and lemon zest in a medium bowl. Mix until well blended. Press the mixture firmly into the bottom of a 9-inch springform pan. Refrigerate while preparing the filling.
02 - Beat the cream cheese and sugar in a large bowl until smooth and creamy. Add lemon juice, lemon zest, and vanilla extract. Mix until fully combined.
03 - Whip the cold heavy cream in a separate bowl until stiff peaks form.
04 - Gently fold the whipped cream into the cream cheese mixture until fully incorporated. Carefully fold in 1 2/3 cups blueberries, taking care not to crush them.
05 - Pour the filling over the chilled crust and smooth the top with a spatula.
06 - Cover and refrigerate the cake for at least 4 hours, or until completely set.
07 - Remove the cake from the pan. Top with remaining blueberries, sprinkle with lemon zest, and garnish with whipped cream if desired.