Preheat oven to 350℉.
In a medium bowl, combine the dry ingredients (flour, nutmeg, cinnamon, baking soda, salt). Mix a bit to combine.
In a large bowl, combine brown sugar and eggs - mix to combine. Add in the butter and vanilla and mix until combined as well. Lastly, add in the bananas and mash them up a bit while stirring into the mixture.
In 3 sections, add the dry ingredients into the wet, stirring until just combined. Key is to not over-stir. Gently fold in the walnuts and chocolate chips.
Grease a bread pan with non-stick spray or butter, then add in the mixture and bake for 60 minutes.