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 the 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 - 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 smooth.
05 - Carefully fold in 1 2/3 cups fresh blueberries, taking care not to crush the berries.
06 - Pour the filling over the chilled crust and smooth the top with a spatula.
07 - Cover and refrigerate for at least 4 hours, or until completely set and firm.
08 - Remove the cake from the springform pan. Top with remaining 3/4 cup blueberries, sprinkle with lemon zest, and garnish with whipped cream if desired.