Preheat your oven to 325°F (163°C).
In a medium bowl, combine the graham cracker crumbs, ¼ cup sugar, and melted butter until evenly mixed. Press this mixture into the bottom of the 9-inch springform pan to form an even crust. Bake for 10 minutes, then remove and let it cool.
In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth. Gradually mix in ¾ cup sugar until well combined.
Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract, lemon zest, and lemon juice until smooth.
Gently fold in the blueberries into the cheesecake mixture.
Pour the filling over the cooled crust, spreading it evenly. Bake for 50-60 minutes or until the center is set and only slightly jiggly.
Remove the cheesecake from the oven and allow it to cool at room temperature before refrigerating for at least 4 hours, preferably overnight.
For the topping, in a small saucepan over medium heat, combine 1 cup blueberries, ¼ cup sugar, cornstarch, and lemon juice. Cook for 5-7 minutes, stirring gently until the mixture thickens slightly.
Let the blueberry topping cool, then spread it over the cheesecake before serving.