Creating Berry Cheesecake Bliss might seem daunting, but following these simple steps will ensure success:

1. Preheat the Oven: Preheat your oven to 325°F (163°C). Grease a 9-inch springform pan and set it aside.

2. Make the Crust: In a bowl, mix the crushed graham crackers and melted butter until well combined. Press this mixture firmly into the bottom of the springform pan.

3. Prepare the Cheesecake Filling: In a large bowl, beat the cream cheese with an electric mixer until smooth. Gradually add the sugar and vanilla extract, mixing until well blended.

4. Add Eggs: Add the eggs one at a time, beating well after each addition. Scrape down the sides of the bowl to ensure everything is mixed thoroughly.

5. Combine the Sour Cream and Flour: Gently mix in the sour cream and flour until smooth. Pour the cheesecake filling over the prepared crust in the springform pan.

6. Bake the Cheesecake: Bake in the preheated oven for 50-60 minutes or until the center is set but still slightly jiggly. Turn off the oven and crack the oven door, letting the cheesecake cool inside for one hour.

7. Chill the Cheesecake: After an hour, remove the cheesecake from the oven and let it cool to room temperature. Cover with plastic wrap and refrigerate for at least 4-6 hours, or overnight for best results.

8. Prepare the Berry Topping: In a medium saucepan over medium heat, combine the mixed berries, sugar, cornstarch, lemon juice, and water. Stir gently until the mixture begins to thicken, about 5-7 minutes. Remove from heat and let cool.

9. Top the Cheesecake: Once the cheesecake is thoroughly chilled, spread the berry topping evenly over the surface of the cheesecake.

10. Serve and Enjoy: Release the sides of the springform pan and slice the cheesecake into wedges for serving.