01 - In a medium bowl, combine graham cracker crumbs, melted butter, 2 tablespoons sugar, and lemon zest. Mix until well blended and the mixture resembles wet sand. Press firmly into the bottom of a 9-inch springform pan, creating an even layer. Refrigerate while preparing the filling.
02 - In a large bowl, beat the softened cream cheese and 3/4 cup sugar until smooth and creamy, approximately 2-3 minutes. Add lemon juice, lemon zest, and vanilla extract. Mix until fully incorporated and no lumps remain.
03 - In a separate chilled bowl, whip the cold heavy cream using a hand mixer or stand mixer until stiff peaks form. Be careful not to overwhip. The cream should hold its shape when the beaters are lifted.
04 - Gently fold the whipped cream into the cream cheese mixture using a spatula, incorporating until fully blended and smooth. Carefully fold in 1 2/3 cups fresh blueberries, taking care not to crush the berries.
05 - Pour the blueberry cream filling over the chilled crust. Use an offset spatula to smooth the top, creating an even surface. Cover the springform pan with plastic wrap or foil.
06 - Refrigerate the cake for at least 4 hours, or overnight for best results. The filling should be firm and hold its shape when cut.
07 - Remove the cake from the springform pan. Top with the remaining 3/4 cup fresh blueberries, distributing evenly. Sprinkle with lemon zest and add whipped cream garnish if desired. Slice and serve chilled.