1. Preheat oven to 350 degrees Fahrenheit. Grease a loaf pan. In a large mixing bowl, mash bananas well with a fork or potato masher. Add applesauce, maple syrup, sugar, and flax seeds; mix to combine.
2. In a separate bowl, combine flour, baking soda, salt, and cinnamon; mix thoroughly. (Or you don't have to do this step if you don't feel like it, it works just as well to just dump all the dry ingredients into the wet without mixing first.)
3. Add the dry to the wet and stir until thoroughly incorporated. Add nuts if you're using them. Pour into prepared loaf pan, and bake for 50 to 60 minutes, or until the loaf starts to turn golden brown and the toothpick test is successful.
4. Remove loaf pan from oven and cool on a wire rack for 5 minutes. Transfer loaf to wire rack and let cool completely, or as long as you can wait.
Slice and enjoy.
Source of recipe: I came up with this recipe after mucking around with other banana bread recipes, trying to find one that suited my tastes.