Preheat the oven to 170 degrees
Add the flaxseed, wheatgerm, oats, flour, cinnamon and salt to a large bowl and mix with a wooden spoon.
In a separate bowl, mash a banana thoroughly. Add the apple puree, peanut butter and plant milk and mix in well. You shouldn't have any lumps.
If it is too runny, add in some more oats or wheatgerm. If it's too thick, add a splash more plant milk or some coconut oil.
Take a small amount of the mixture (around a tablespoon's worth) and roll into a ball. It should come together nicely in your hand. Flatten slightly on a silicone baking mat (or lined baking tray) and pop in the oven.
Bake for 20 minutes. Set aside to cool.