Add the cream cheese, sugar, and corn starch to a medium sized mixing bowl, or to the bowl of a stand mixer fitted with the paddle attachment.
Beat the mixture until the cream cheese is completely smooth and free of lumps.
Add the two eggs into the bowl, and beat the mixture on low speed *just* until the eggs have been fully incorporated.
Add in the heavy cream, lemon juice, and vanilla bean paste. Again, beat the mixture on low speed just until cohesive.
Portion out 75g (⅓ c.) of the blueberry jam. Add dollops of the jam on top of the batter, then fold the batter a few times to lightly swirl the jam into the cheesecake.
Tap the bowl on the counter a few times to help remove extra air from the batter.
Pour ½ of the batter on top of the shortbread crust. Then, dollop the remaining wild blueberry jam over the cheesecake in the pan, smoothing it out to form an even layer. Pour the remaining cheesecake batter over the jam.
Fill a 10" cake pan, or any larger pan that can reasonably fit the 7" springform pan inside of it, a third of the way with hot water. Wrap tinfoil around the sides and bottom of your springform pan to help avoid the possibility of water seeping into it.
Place the springform pan into the larger pan, then place the whole thing into the oven. Bake for 65-75 minutes, or until the cheesecake only slightly wobbles and reaches an internal temperature of at least 155°F / 68°C.* If the cheesecake starts to brown on top, gently place a piece of tinfoil over the top of the pan for the rest of the baking time.
Once the cheesecake is fully cooked, turn off the oven and leave the door slightly ajar with the cheesecake in it for 1 hr. Once the hour has passed, cover the cheesecake and place it in the fridge to set overnight (at least 8 hours.)