Preheat the oven to 350°F. Prepare your loaf pan by greasing it with avocado oil and placing a strip of parchment paper about the width of the bottom with enough slack to stick out to make the pan. This makes it easier to lift the loaf out of the pan later.
In a large mixing bowl, sift flour, baking soda, baking powder, and salt. Set aside.
Combine mashed bananas, eggs, sugar, and oil in a medium mixing bowl. Mix well.
Slowly combine wet ingredients with dry ingredients using a wooden spoon. Mix until just combined with no clumps.
Pour into prepared loaf pan and tap out any air bubbles.
Spoon Honey Walnut Mixture over top of the batter.
Bake on the middle rack. After 30 minutes place a sheet of aluminum foil over the top of the loaf. This will prevent the topping from burning.
After an hour, use a toothpick or knife to check for doneness. If still wet, leave for another 10 minutes or until the knife comes out clean.
After the loaf is removed from the oven, allow cooling in the pan for 20 minutes before removing it onto a cooling rack.
Allow the loaf to cool COMPLETELY before cutting into it. This will allow the loaf to develop more flavour!