Combine the whey protein with the oat flour, the brown rice flour, the sweetener and the vita fiber powder.
Add the egg, the applesauce and the vanilla bean powder and mix everything until combined. I recommend using a spatula after the mixing for cleaning the sides of the bowl and having the insurance that everything is evenly incorporated.
Pour the resulted mixture in a 23cm baking pan with a removable bottom lined with baking paper. I cover the bottom only, but you could cover the sides also for an easier release.
Bake the base in the preheated oven at 180 degreed Celsius for 20 minutes or until firm to the touch.
Pour all the ingredients in a bowl and mix just until combined. If necessary, stop to clean the sides of the bowl and mix again.
Pour the cheesecake mixture over the base and even it out with a spatula. Tap the pan to release the air bubbles.
Cover our pan with aluminum foil and place it in a baking tray. Pour in hot water until it reaches the middle of our pan.
Bake the cheesecake in the preheated oven at 150 degrees Celsius for approximately one hour. I necessary, you can extend the baking period, but I recommend checking it after one hour. Our cheesecake will have a a relatively firm surface when it will be done.
Put it aside and let it cool completely.
Run a knife between the cheesecake and the pan for an easier release.
Remove the sides of the pan and transfer the cheesecake on a serving platter.
Combine the powdered milk with the cocoa, the whey protein and the sweetener.
Pour the milk in a cup, add the cocoa butter and heated it in the microwave until the cocoa butter has melted. The heating time can vary between 30 and 60 seconds. If you don't use the microwave, you can heat the mixture in a pot/saucepan.
Pour the warm milk over the dry ingredients am mix everything until you have a creamy and homogeneous ganache.
Pour your ganache over the cheesecake and spread it evenly using a spatula.
Put it in the fridge for 20-30 minutes to set. Cut it in 8 equal slices and serve.
Keep it in the fridge until the consumption. If you like your ganache to be very creamy, heat your cheesecake slice in the microwave for 30 seconds before serving.