In a large bowl smash the Bananas with a fork and mix them with the wet ingredients (egg, mayo and vanilla) with a mixer until thoroughly mixed and fluffy - about 30 seconds.
Mix the dry ingredients together in a separate bowl with a whisk until thoroughly mixed.
Fold the dry ingredients into the banana mixture, until combined (don't over mix)
Pour the mixture into a greased loaf pan (8-½" x 4-½')
Bake for 50 Minutes - toothpick should come out clean.
Take out of the oven and after 5 minutes remove from loaf pan and allow to cool on a rack.
Notes
The nuts can be substituted with pecans, or no nuts at all.The riper the banana the sweeter. Try to use bananas that are very ripe for a delicious sweetness.