With a hand mixer or stand mixer, beat together the cream cheese, biscoff spread, lemon juice, sugar, and cornstarch until evenly mixed. Careful not to overbeat the mixture and whip air into it. It will affect the texture later.
Once evenly mixed, pour the filling into the pan and evenly spread it in the pan with a spoon or spatula. Don't stress about any lines or creases since we will be covering with a biscoff spread later.
Now it's time to bake the cheesecake. First, you'll need to put a pan or oven-safe bowl filled with some water on the bottom rack. Next, you can place the cheesecake on a baking sheet and then on the middle rack of the oven.
Bake the cheesecake for 30 minutes, making sure not to open the oven while it cooks, or the cheesecake might sink in the middle. Once the timer goes off, keep the oven closed, turn off the heat, and let it rest for 5 more minutes.
Now you can remove the cheesecake from the oven and place it on a countertop for at least 20 minutes while it comes to room temperature. Then you can place the cheesecake in the fridge and allow it to cool and set for at least 5 hours.