Preheat oven to 350 F
Line a 9×9 baking dish with cooking spray, layer it with one sheet of parchment paper then spray the parchment paper with cooking spray.
Prepare flax eggs: In a small bowl, mix together flaxseed meal and water. Let this mixture sit for about five minutes in order to thicken.
In the bowl of an electric mixer fitted with the whisk attached, combine brown sugar, flax eggs and vanilla then cream together. Add in mashed bananas and continue whisking until smooth.
Once banana mixture is smooth, add flour, oats, baking soda and salt to the bowl and mix until just combined (don’t over mix).
Pour mixture into parchment paper lined baking dish (step 2) and bake for about 20-25 minutes or until knife test comes out clean (mine took the full 25 minutes… the top should be puffed up and golden).
(Make ganache while cake bars are baking! See below for recipe!)
Let banana bread cake cool completely. Slice into 12 bars, spread 1 tbsp of ganache to the top of each bar and enjoy!