Pre-heat oven to 350°F
Line your loaf baking dish with parchment paper.
First, blend your oats into a flour, then pour into a big bowl.
Add the rest of the dry ingredients to the oat flour and stir until combined.
Put all wet ingredients in your blender, blend until smooth.
Pour the wet ingredients into the dry and mix until combined.
Pour the mixture into your loaf pan (either a medium-sized one or 2 small ones). Fill it up almost all the way to the top.
Place the halved banana on top with a few walnuts.
Bake for 50 minutes.
Let cool a few minutes before removing to a cooling rack.
Enjoy! (Maybe with some of this jam!)