When you’re ready to begin, preheat the oven to 170°C.
Take the eggs and separate the egg yolks from the egg whites.
Beat the egg whites with a handheld mixer or food processor until stiff peaks form. Put them in a bowl and set them to one side.
Add the cream cheese and maple syrup to a blender. Mix until smooth.
Add in the egg yolks, sour cream, lemon juice, lemon zest, vanilla extract and corn starch to the mixer and blend until just combined. Remove and spoon into a bowl.
Gently fold in the beaten egg whites. Don’t over mix as you want to keep the air bubbles, just slowly stir until combined.
Pour the mixture on top of the precooked cheesecake base. Fill your cake tin to about half cm below the top of the sides.
Cook in the oven for 30 minutes at 170°C or until you see that the cheesecake is ready.
Timing is everything with cheesecake so keep a close eye on it as it’s cooking. You want to take it out when the sides are firm but the middle is still wobbly. It will continue cooking afterwards so don’t worry if it doesn’t look completely done. The cheesecake should also not start to brown on top.
When you see your cheesecake is ready, turn off the heat but leave the cheesecake in the oven for another 30 minutes with the oven switched off. If you remove it from the oven too quickly, cheesecake can crack from the rapid cooling.
After 30 minutes, take it out of the oven and let it cool completely to room temperature before putting in the fridge for a few hours or overnight to set.