Preheat the oven to 350°F. Grease and flour two 9x5-inch loaf pans.
In a medium bowl, whisk together the flour, baking powder, cinnamon, ginger, baking soda and salt.
In a large bowl, combine the pumpkin, eggs, sugars, bananas and vegetable oil. Beat with an electric mixer until smooth. Gradually beat in the flour mixture just until the mixture is wet (do not over mix); stir in the nuts (if using). Spoon into the prepared loaf pans.
Bake 55 to 60 minutes or until a wooden pick inserted into the center comes out clean. Cool in pans on wire racks for 10 minutes; remove to wire racks to cool completely.
Notes
NOTE: the optional nuts are not included in the nutritional information.