Preheat oven to 350 degrees.
In a medium to large bowl mix together the bananas, pumpkin, eggs, vanilla, and sugars until the ingredients are combined and creamy.
Slowing stir in the melted butter.
In the same bowl, on top of the wet ingredients, add the flour, ground flaxseed, baking soda, pumpkin pie spice, and salt.
Slowly stir ingredients together just until combined.
Bake for 55 minutes. When you put a toothpick in it should come out with some bread stuck to it but not raw dough.
Let the bread sit for 5 minutes in the bread pan.
Remove from the pan and let the bread finish cooling on a wire rack. Cut into 16 pieces. Do this by first cutting into 8 thick slices and then cut those slices in half.