Pre heat the oven to 375°
In a large mixing bowl using a fork, mash the bananas really well
To the mashed bananas, whisk in the egg, vanilla extract, maple syrup, melted ghee, and coconut sugar
In a smaller mixing bowl, whisk together the cassava flour, baking powder, baking soda, cinnamon, nutmeg, and salt
In small batches, slowly add the dry ingredients to the wet ingredients and combine well.
Once mixture is combined well, fold in the walnuts
Fill a muffin pan with liners and evenly distribute the mixture into each muffin tin