Place stoned plums in mixing bowl (if they're overripe, the stones will squish out with no problem). Add banana and mash well. Add remaining wet ingredients and mix well.
In sifter, combine dry ingredients and sift into wet mixture, beating well by hand or with mixer. Blend in nutmeats if desired.
Pour into nonstick loaf pan and bake at 350ºF for approximately 1 hr, or until a knife blade comes out clean.
Tip pan on its side and allow to cool on a bread rack before unmolding.
I created this when a bag of plums got pushed to the back of the fridge and were too soft to eat when I remembered them. What a lovely mistake!