Preheat the oven to 350°.
Combine all the dry ingredients in a small bowl. In another bowl, mash the banana. Then add the applesauce, maple syrup, vanilla extract and olive oil to the banana. Stir well to incorporate.
Add the dry ingredients to the wet and carefully stir until combined.
Lightly oil an 8 x 8 glass pan. Scoop 2/3 of the mixture into the bottom of the pan, spreading it out evenly.
Spoon the fruit jam, or your filling, on top and spread across the mixture.
Gently sprinkle the rest of the dough on top of the fruit.
Try to spread it out evenly – it doesn’t have to be completely covering the fruit.
Bake for 30 minutes, until slightly browned on top. Cool in the pan and cut into bars.
Enjoy!