Preheat the oven to 350°F. Spray a 9x13-inch baking dish with nonstick spray and set it aside.
In a medium-sized mixing bowl, combine the graham cracker crumbs, sugar, lemon zest, and melted butter. Stir until the mixture is completely combined.
Press the crust mixture into the bottom of the prepared baking dish. Bake for 10 minutes. Remove from the oven and reduce the temperature to 325°F.
Filling
Using a medium-sized mixing bowl and a handheld mixer on low speed, beat together the cream cheese, sugar, sour cream, vanilla, lemon juice, and lemon zest just until well combined.
Keeping the mixer speed on low, add the eggs one at a time. Mix until the filling is completely incorporated.
Evenly pour the filling on top of the crust.
Drop the lemon curd by teaspoon on top of the filling. Use a knife, toothpick, or offset spatula to shallowly swirl the lemon curd, being careful not to swirl too deep. Bake for 40 minutes.
Remove the cheesecake from the oven, allow the cheesecake to sit at room temperature for 1 hour.
Place the cheesecake in the refrigerator for at least 2 hours before slicing and serving.
Video
Notes
For the creamiest cheesecake, make sure to use full-fat cream cheese and sour cream.
If you need to crush the cookies for the crust, pulse in a blender or food processor until they are fine crumbs.
Use the bottom of a flat measuring cup to press the crust into the bottom of the pan. This ensures a nice firm base for the bars.
Make sure your cream cheese is room temperature, or it may leave lumps in the filling.
If a brighter shade of lemon curd for the swirl is desired, you can add 2 to 3 drops of yellow food coloring.
Before slicing your sweet treat, you can place the cheesecake in the freezer for 15 to 20 minutes for a cleaner cut.