Preheat the oven to 350°F. Grease and flour a 9×5 inch loaf pan.
In a large bowl whisk together the oil, sugars, eggs & vanilla extract until no lumps remain.
Stir in the mashed bananas & pumpkin puree. Carefully stir the flour mixture into the wet ingredients using a rubber spatula or wooden spoon. Then stir in the chopped nuts
Pour the batter into the prepared pan and bake for 50-60 minutes or until an inserted toothpick comes out clean and the top feels firm to the touch. The loaf shouldn't wobble if you nudge the pan.