Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius) and lightly grease a 9x5 inch loaf pan.

In a large mixing bowl, mash the bananas with a fork or whisk until a smooth consistency is achieved.

Incorporate the vegetable oil, sugar, beaten egg, and vanilla extract into the banana mixture.

Add the baking soda and salt directly to the wet ingredients and stir to distribute evenly.

Sift in the all-purpose flour and fold gently until no dry streaks remain, taking care not to overwork the gluten.

Transfer the batter into the prepared loaf pan and smooth the surface.

Bake for 60 minutes or until a skewer inserted into the center of the loaf emerges clean.

Cool the bread in the pan for 10 minutes prior to transferring to a wire cooling rack.