Prep the Oven: Preheat your oven to 200 degrees Celsius and grease a baking pan.
Blend the Base: In a blender, combine the ripe bananas, coconut oil, eggs, cinnamon powder, brown sugar, and water. Blend until smooth.
Mix Dry Ingredients: In a separate bowl, mix the almond flour, rolled oats, and baking powder together.
Combine Mixtures: Carefully fold the blended mixture into the dry ingredients until well combined.
Add Nuts and Fruits: Gently fold in the chopped chestnuts, raisins, and apricots.
Bake: Pour the batter into the greased pan, sprinkle some brown sugar on top, and add a few whole chestnuts for extra flair. Bake in the oven for 35 minutes or until a toothpick inserted comes out clean.
Cool and Serve: Let it cool for a few minutes before slicing. Enjoy warm or at room temperature!