Instructions:

• Adjust oven rack to the lower third position and preheat the oven to 350°F (177°C). Spray a 9-inch springform pan with nonstick cooking spray. Set aside.
• Make the blueberry sauce first: Whisk the cornstarch, lemon juice, and warm water together in a small bowl until the cornstarch has dissolved. Set aside. Warm the blueberries and sugar together in a small saucepan over medium heat. Stir continuously for 3 minutes until the blueberry juices begin to release. Add the cornstarch mixture and continue to stir for another 2-3 minutes, smashing some blueberries as you go. The mixture will start to thicken. Remove from heat and put the mixture through a fine mesh strainer into a small bowl (to separate the cooked berries and the juice). Keep separated and set both (the cooked berries and the juice) aside.
• Make the graham cracker crust: Click here for some handy graham cracker crust tips before you get started. Mix the graham cracker crumbs, melted butter, and granulated sugar together in a medium bowl until combined. Press into the bottom of the prepared pan and only slightly up the sides. The crust will be thick. Wrap aluminum foil on the bottom and tightly around the outside walls of the springform pan, as shown in photos above. Bake the crust for 7 minutes. Allow to slightly cool as you prepare the filling.
• Make the filling: Using a handheld or stand mixer fitted with a paddle attachment, beat the cream cheese and granulated sugar together on medium speed in a large bowl – about 3 full minutes until the mixture is smooth and creamy. Add the sour cream and vanilla, beat until combined. On low speed, add the eggs one at a time, beating after each addition until just blended. Do not overmix the filling after you have added the eggs.
• Pour the filling into the cooled crust. Drop spoonfuls of the smooth blueberry sauce onto the batter. Using a knife, gently swirl as shown in the photo above. If you have leftover blueberry sauce, mix it with the cooked blueberries you set aside. Save for topping the baked cheesecake.
• Place the springform pan into a large roasting pan and place into the oven. Fill with about 1 inch of hot water. The foil wrapped around the pan will prevent water from leaking inside.
• Click here to read more about my cheesecake water bath.
• Bake for 50-60 minutes or until the center is almost set.* Turn the oven off and open the door slightly. Let the cheesecake sit in the oven for 1 hour. Remove from the oven and allow to cool completely at room temperature. Refrigerate for at least 6 hours or overnight (preferred). Loosen the cheesecake from the rim of the pan and remove the rim. Cut into slices and serve chilled. Top with remaining chunky blueberry sauce, if desired. Cover leftover cheesecake and store in the refrigerator for up to 4 days.