Preheat oven to 350°. Thoroughly grease a 9x5x3 bread pan, or line with parchment paper.
Beat together bananas, oil, eggs, and sugar, until thoroughly mixed.
Sift together flour, salt, and baking powder.
Gently stir dry ingredients into banana mixture, until fully incorporated.
Stir in nuts, if desired.
Pour batter into prepared bread pan.
Bake 50 minutes, or until top is golden brown, and center is set.
Remove from pan, and cool on a rack before slicing.
(This bread gets even better after resting several hours, if you can make yourself wait!)