Prepare the Crust:
Preheat the oven to 325°F (163°C) and grease a 9-inch springform pan.
In a mixing bowl, combine the graham cracker crumbs, sugar, and melted butter.
Press the mixture firmly into the bottom of the pan to create an even crust.
Bake for 10 minutes, then set aside to cool.
Make the Raspberry Sauce:
In a small saucepan, combine the raspberries, sugar, and lemon juice.
Cook over medium heat, stirring occasionally, until the raspberries break down and the mixture thickens (about 5–7 minutes).
Strain the sauce through a fine mesh sieve to remove seeds and set aside to cool.
Prepare the Cheesecake Filling:
In a large mixing bowl, beat the cream cheese until smooth.
Add the sugar and mix until fully incorporated.
Beat in the eggs one at a time, followed by the sour cream, lemon juice, lemon zest, and vanilla extract.
Assemble the Cheesecake:
Pour the cheesecake filling over the cooled crust, spreading it evenly.
Drop small spoonfuls of the raspberry sauce on top of the filling.
Use a skewer or knife to gently swirl the raspberry sauce into the cheesecake, creating a marbled effect.
Bake the Cheesecake:
Place the springform pan on a baking sheet and bake for 50–60 minutes, or until the edges are set and the center is slightly jiggly.
Turn off the oven and let the cheesecake cool inside with the door slightly ajar for 1 hour.
Refrigerate the cheesecake for at least 4 hours or overnight before serving.
Garnish and Serve:
Top with fresh raspberries, lemon slices, or a dusting of powdered sugar for a beautiful presentation.