01 - In a medium bowl, combine graham cracker crumbs, melted butter, 2 tablespoons sugar, and lemon zest. Mix until well blended and the texture resembles wet sand. Press the mixture firmly into the bottom of a 9-inch springform pan, using the back of a spoon to create an even layer. Place in the refrigerator to chill 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. Scrape down the sides of the bowl as needed. Add lemon juice, lemon zest, and vanilla extract; mix until fully incorporated and the mixture is uniformly smooth.
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 over-whip, as the cream may become grainy. The whipped cream should hold its shape when the beaters are lifted.
04 - Gently fold the whipped cream into the cream cheese mixture using a rubber spatula. Add approximately one-third of the whipped cream at a time, using a folding motion to incorporate without deflating the air. Continue until no white streaks remain and the filling is light and airy.
05 - Carefully fold 1 2/3 cups fresh blueberries into the cream mixture. Use a gentle folding motion to distribute the berries evenly without crushing them. The batter should have a marbled appearance with blueberries throughout.
06 - Remove the crust from the refrigerator. Pour the blueberry cream filling over the chilled crust, spreading it evenly with a spatula. Smooth the top surface to create a level finish. Tap the pan gently on the counter to release any air bubbles.
07 - Cover the springform pan with plastic wrap or aluminum foil. Refrigerate the cake for at least 4 hours, or overnight for best results. The cake is properly set when it feels firm to the touch and holds its shape when the pan is gently shaken.
08 - Before serving, carefully remove the springform ring. Arrange the remaining 3/4 cup fresh blueberries over the top of the cake. Sprinkle with lemon zest for a bright, aromatic finish. Add a dollop of whipped cream around the edges if desired. Slice with a sharp knife dipped in hot water for clean cuts.