01 - In a medium bowl, combine graham cracker crumbs, melted butter, 2 tablespoons sugar, and lemon zest. Mix until well blended. Press the mixture firmly into the bottom of a 9-inch springform pan. Place in the refrigerator while you prepare the filling.
02 - In a large bowl, beat the cream cheese and sugar until smooth and creamy. Add lemon juice, lemon zest, and vanilla extract; mix until fully combined.
03 - In a separate chilled bowl, whip the cold heavy cream to stiff peaks using a hand mixer or stand mixer.
04 - Gently fold the whipped cream into the cream cheese mixture until fully incorporated and no streaks remain.
05 - Carefully fold in 1 2/3 cups fresh blueberries, taking care not to crush them.
06 - Pour the filling over the chilled crust and smooth the top with a spatula.
07 - Cover and refrigerate the cake for at least 4 hours, or until completely set and firm.
08 - Before serving, remove the cake from the pan. Top with the remaining blueberries, sprinkle with lemon zest, and garnish with whipped cream if desired.