Preheat oven to 350 degrees Fahrenhiet. Oil a bread pan and line with parchement paper
First, mix egg replacer with water - let sit for 5 minutes or while combing other ingredients.
In a large bowl, combine mashed bananas, butter, yogurt and "eggs". Beat with a mixer. Add sugars and blend with mixer until combined
In a smaller bowl, whisk flour, flaxseed, baking soda, salt, and cinnamon.
Add flour mixture to banana mixture and blend with mixer until combined. Stir in walnuts.
Pour batter into prepared pan and bake 55-60 minutes. Or until toothpick inserted in the center comes out clean.
Remove from oven. Cool 15 minutes in pan, then transfer to a wire rack to cool completely.