Preheat oven to 350 F. Butter and flour a standard size, 9×4, loaf pan.
In a large bowl, whisk together the flour, spices, baking soda, and salt.
In a separate bowl, whisk together the sugar and oil, pumpkin and banana. Add the egg and whisk well.
Whisk in the dry ingredients until you have a smooth batter. There will be lumps of banana, this is fine.
If you like, you can add a thin, long slice of banana to the top.
Bake for about 50 minutes.
Cool for 5-10 minutes in the pan and then remove and set on a cooling rack. The bread is best the next day.