Preheat the oven to 350 degrees Fahrenheit and line a 9 x 5in loaf pan with parchment paper.
In a large bowl mash the bananas with a fork or potato masher until smooth.
Add eggs, maple syrup, melted coconut oil and vanilla and stir well.
In a separate bowl combine all the dry ingredients: oats, spelt flour, cinnamon, baking powder, baking soda, salt and cinnamon.
Add dry ingredients to the banana-egg mixture and stir with a spatula until combined. Do not overmix!
Pour the batter into the prepared loaf pan, top with walnuts and mini chocolate chips (if using).
Bake in the preheated oven for 50 minutes or until a toothpick inserted in the center comes out clean.
Place on a cooling rack and let the bread cool for at least 20 minutes. Take out of the pan and let cool more before slicing.
Serve on its own or with butter or almond butter.