Creating a Blueberry Lemon Cheesecake can be easy if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 325°F (160°C).
2. Prepare the Crust: In a mixing bowl, combine graham cracker crumbs, melted butter, and sugar. Mix until well combined.
3. Press the Crust: Press the crumb mixture into the bottom of a 9-inch springform pan, creating an even layer. Bake for 10 minutes and then let it cool.
4. Make the Cheesecake Filling: In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth. Gradually add sugar and mix until creamy.
5. Add Lemon: Stir in lemon zest, lemon juice, and vanilla extract. Mix until well combined.
6. Incorporate Eggs: Add the eggs one at a time, mixing on low speed until just blended. Do not overmix.
7. Pour Filling: Pour the cheesecake filling over the cooled crust in the springform pan.
8. Bake: Bake in the preheated oven for 45 minutes or until the center is set but slightly jiggly.
9. Cool: Once baked, remove from the oven and let it cool at room temperature for about 30 minutes. Then refrigerate for at least 1 hour.
10. Prepare Blueberry Topping: In a small saucepan, combine blueberries, sugar, lemon juice, and cornstarch (if using). Cook over medium heat until the mixture starts to bubble and thicken.
11. Cool Topping: Remove from heat and let it cool slightly.
12. Top the Cheesecake: Once the cheesecake is chilled, pour the blueberry topping evenly over the cheesecake.
13. Chill Again: Return the cheesecake to the refrigerator for another 30 minutes to set the topping.
14. Serve: Carefully remove the sides of the springform pan and slice the cheesecake into wedges.

Following these steps will guide you in creating this incredible Blueberry Lemon Cheesecake effortlessly.