01 -
Preheat oven to 160°C. Line the base of a 23-centimeter springform pan.
02 -
Combine graham cracker crumbs, sugar, and melted butter until evenly mixed. Press the mixture firmly into the base of the prepared pan.
03 -
Bake the crust for 10 minutes. Remove from oven and set aside to cool completely.
04 -
In a saucepan over medium heat, combine mixed berries, sugar, and lemon juice. Cook until berries are softened and release their juices. Blend to a puree, then strain to remove seeds and obtain a smooth sauce.
05 -
In a stand mixer, beat the softened cream cheese until smooth and lump-free. Add granulated sugar and vanilla extract, beating until well incorporated. Mix in eggs one at a time at low speed, ensuring each is fully blended before adding the next. Gently fold in sour cream and lemon zest until just combined.
06 -
Pour half of the cheesecake filling over the cooled crust. Drop spoonfuls of the berry puree and gently swirl with a knife or skewer. Repeat with the remaining filling, adding more swirls on the surface.
07 -
Wrap the bottom of the springform pan with foil. Place the pan in a deep roasting tray and fill with hot water halfway up the sides of the pan.
08 -
Bake for 55 to 65 minutes, or until the center is just set with a slight wobble. Turn off the oven, crack the door open, and let the cheesecake cool inside for 1 hour.
09 -
Remove from oven, cool completely at room temperature, then chill in the refrigerator overnight for best texture.