Preheat your oven to 350°F (175°C). Line an 8x8 inch baking dish with parchment paper, leaving an overhang on the sides for easy removal.
In a mixing bowl, combine the graham cracker crumbs, melted butter, and 2 tablespoons of sugar. Mix until the crumbs are well coated.
Press the crumb mixture firmly into the bottom of the prepared baking dish to form an even crust. Bake for 8-10 minutes until set and slightly golden. Remove from oven and let cool slightly.
In a large bowl, beat the softened cream cheese with an electric mixer until smooth. Gradually add the ¾ cup sugar, mixing until creamy.
Add the eggs one at a time, ensuring each is fully incorporated before adding the next. Mix in the lemon zest, lemon juice, and vanilla extract until blended.
In a separate small bowl, toss the blueberries with cornstarch. Gently fold the blueberries into the cheesecake batter, taking care not to burst them.
Pour the cheesecake batter over the pre-baked crust and spread it out evenly.
Bake in the preheated oven for 25-30 minutes or until the edges are set and the center is slightly jiggly. The cheesecake will firm up as it cools.
Once baked, remove from the oven and allow to cool in the baking dish for about 30 minutes. Then refrigerate for at least 2 hours or until completely chilled.
Use the parchment paper overhang to lift the cheesecake out of the dish. Cut into bars and serve. Garnish with extra fresh blueberries if desired.
Notes
Chill for at least 2 hours before serving for best texture.