In a food processor, mash bananas. Add melted butter and the eggs one by one, mixing well after every addition. Add vanilla essence and give it another mix.
In a bowl, mix almond meal, rice flour, baking powder, baking soda and cinnamon. Mix the dry ingredients with the wet ones (either by pulsing in the food processor or by hand with a spatula).
Line a loaf pan with baking paper and pour batter in it.
Bake for about 40 minutes or until it feels firm to the touch at the middle of the loaf.
Turn off heat and let cool down 10 minutes in oven and then outside on a cooling rack covered with a tea towel.