Chocolate bread
Preheat the oven to 170℃ (338℉).
Blend the banana and eggs in a blender until smooth.
Add almond flour, cocoa powder, baking powder, and stevia, and mix well.
Chop nuts (optional) finely and mix into the batter.
Pour the batter into a baking pan.
Bake in a 170℃ (338℉) oven for 20-25 minutes.
Let cool and cut into appropriate sizes.