01 - Preheat oven to 325°F. Line the bottom of a 9-inch springform pan with parchment paper and lightly grease the sides.
02 - In a medium bowl, combine graham cracker crumbs, melted butter, sugar, and salt. Press the mixture firmly into the bottom of the prepared pan. Bake for 10 minutes, then set aside to cool.
03 - In a large bowl, beat the cream cheese and sugar until smooth and creamy. Add eggs one at a time, mixing well after each addition. Mix in sour cream, vanilla extract, and flour until just combined. Avoid overmixing.
04 - Pour the filling over the cooled crust and smooth the top. Tap the pan gently to release air bubbles. Bake in the preheated oven for 50-60 minutes, until the center is just set but still slightly jiggly.
05 - Turn off the oven, crack the door, and let the cheesecake cool inside for 1 hour. Remove from the oven and let cool completely at room temperature. Cover and refrigerate for at least 4 hours, preferably overnight.
06 - Combine blueberries, sugar, and lemon juice in a saucepan. Cook over medium heat for 5 minutes, stirring gently, until blueberries release their juices. Add the cornstarch slurry and cook for 1-2 minutes, until thickened. Remove from heat and let cool.
07 - Spread the cooled blueberry topping over the chilled cheesecake. Release the cheesecake from the pan and transfer to a serving plate. Slice and serve chilled.