Preheat oven to 350°F (175°C). Line a 9x13 inch baking pan with parchment paper, leaving an overhang on the sides.
For the crust: In a medium bowl, combine graham cracker crumbs and sugar. Pour in melted butter and stir until well combined. Press the mixture evenly into the bottom of the prepared baking pan.
For the cheesecake filling: In a large bowl, beat cream cheese and sugar until smooth. Beat in eggs one at a time, then stir in vanilla extract. Pour the filling evenly over the crust.
For the blueberry topping: In a small bowl, gently toss blueberries with sugar and lemon juice.
Spoon the blueberry mixture evenly over the cheesecake filling.
Bake for 30-35 minutes, or until the edges are set and the center is slightly jiggly. Cool completely on a wire rack before cutting into bars.
Notes
For best results, ensure cream cheese is at room temperature before mixing.