Preheat your oven to 350°F (175°C). Grease a loaf pan.
In a large bowl, mix mashed bananas, pumpkin puree, eggs, oil, and sugar until well combined.
In another bowl, whisk together flour, baking soda, salt, cinnamon, and nutmeg.
Gradually add dry ingredients to the wet ingredients, mixing until just combined.
Pour the batter into the prepared loaf pan.
Bake for about 60 minutes, or until a toothpick inserted into the center comes out clean.
Let the bread cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.