Preheat oven to 350° F (175°C) if not still preheated.
In the bowl of a stand mixer, mix the cream cheese, sugar and cornstarch together with a paddle attachment for two minutes on medium speed until everything is smooth and there are no lumps. (You can alternatively use a hand mixer). Scrape down the sides and bottom of the bowl to ensure everything has been mixed well.
32 oz (907 g) cream cheese, softened, 3/4 cup (150 g) granulated white sugar, 3 tbsp (24 g) corn starch
Add in the vanilla bean paste, sour cream, melted and cooled white chocolate, and 1/2 cup of the strawberry jam. Mix for 1 minute on medium speed. Scrape sides and bottom of bowl again.
1 tbsp vanilla, 1/3 cup (82 g) sour cream, at room temperature, 8 oz (226 g) white chocolate bar, melted and slightly cooled, 1/2 cup strawberry jam from above, to be mixed into the batter
At this point, stop and put a pot of water on the stove to start boiling. You will want enough water to go about 1 ½ inches up the sides of the springform pan.
Next add in the eggs and egg yolks one at a time to the cheesecake batter. Mix on low speed, ensuring that each is fully mixed in before adding the next. As soon as the last one is fully mixed in, turn off the mixer. Do not over mix the batter.
3 eggs, at room temperature, 3 egg yolks, at room temperature
If you would like the cheesecake to be extra pink, I recommend adding in a few drops of natural red food coloring at this step. Fold in just until combined.
few drops natural red food coloring
Pour 1/2 of the cheesecake batter into the prepared pan with the crust. Spoon 1/2 of the strawberry jam over the batter. Gently swirl the jam and cheesecake batter together with a butter knife. Don't mix in all the way. Pour the rest of the batter in the pan and spoon the rest of the jam on top. Gently swirl the jam with a butter knife.
3/4 cup strawberry jam from above, to be swirled into the batter
Place the cheesecake in a large roasting pan in the oven. Slowly pour the boiling water into the pan around the cheesecake being careful not to splash the cheesecake.(If you're using the 10-inch pan method, place the cheesecake in the 10-inch pan, then place the 10-inch pan in the large roasting pan. Pour water around the 10-inch pan.) Bake at 350° F (175°C) for 65-75 minutes, just until the center has a slight jiggle. When the time is up, turn off the oven and crack the door open. It helps to use a large wooden spoon to keep the oven door slightly open. Let the cheesecake stay in the oven for another hour. The cheesecake will continue to bake as it is cooling.
Then, remove from the oven and go around the edges of the pan with a butter knife to loosen the crust from the sides of the pan. Let the cheesecake cool completely on the counter, and then refrigerate until completely cold, 8 hours or overnight.