Preheat the oven at 350 F and line parchment paper on a 10X6 inch / 25cm x 15 cm rectangular baking pan.
Mash all bananas with a fork, and whisk in the egg, sugar, vanilla and canola oil.
Mix the flour, baking soda, baking powder, cinnamon and salt together, and then incorporate in the wet mix.
Fold in the chocolate chips.
Pour the batter in the baking pan, and bake for about 65 minutes, or until cooked (Check by inserting tooth pick in the bread, there should be no batter on it and top should be golden). Let cool for 10 minutes.