Preheat the oven to 300 degrees F. Line a 9x13-inch baking pan with foil and spray it with non-stick cooking spray to prevent sticking.
Make the crust. In a medium bowl, whisk together the graham cracker crumbs, granulated sugar, all-purpose flour, and salt until well combined. Pour in the melted unsalted butter and stir until everything is evenly moistened. Press the mixture evenly into the bottom of the prepared pan.
Bake for about 20 minutes, or until the crust is fragrant and begins to brown around the edges. Allow it to cool completely before moving on to the filling.
For the filling, place the cream cheese and granulated sugar into a food processor. Process until the mixture is smooth and creamy, about 3 minutes. Don’t forget to scrape down the sides of the bowl as needed to ensure every bit is blended.
With the food processor running, add the eggs, one at a time. Mix just until incorporated, which should take about 30 seconds total.
Add the vanilla extract and blend for an additional 10 seconds to combine everything. Now, pour the creamy filling over the cooled crust, spreading it out evenly.
Bake the cheesecake in the preheated oven until the center is almost set but still jiggles slightly when you shake the pan—this should take about 45 minutes.
To make the topping, clean the food processor bowl, then add the hulled strawberries and granulated sugar. Process until you have a smooth puree, about 30 seconds.
In a medium bowl, combine the strawberry puree with the sour cream until mixed well.
When the cheesecake is out of the oven, pour the strawberry mixture over the top, gently spreading it to cover the cheesecake layer completely.
Return the pan to the oven and bake for an additional 15 minutes, or until the topping is just set.
Once done, transfer the pan to a wire rack and let it cool completely at room temperature for about 2 hours.
After cooling, refrigerate the cheesecake for at least 4 hours or up to 24 hours.
Finally, lift the cheesecake out of the pan using the foil edges and cut it into squares. Garnish with the thinly sliced strawberries if desired.
