Preheat the oven to 350 degrees F.
Spray two 9x5-inch loaf pans with cooking spray before lining them with parchment paper. Spray the parchment paper with a bit more cooking spray. Set aside.
Combine the pumpkin puree, eggs, vanilla extract mashed bananas, water, and sugar in a medium-sized bowl. Mix until combined.
In another medium-sized bowl, whisk together the flour, baking soda, salt, and pumpkin pie spice. In several additions, add the dry ingredients to the wet, stirring until everything is just combined.
Add the chocolate chips, if desired, and mix until they are distributed throughout the batter.
Pour equal amounts of the batter into each of the prepared loaf pans. A kitchen scale can be helpful.
Bake for 60-70 minutes, or until a toothpick, when inserted into the center of the loaves, comes out clean.