Picture posting is enabled for all :)
Turn the clock back a few thousand years and our diet would consist to a large extent of the weeds we spend hours ripping out of our allotments. Small clearings in the forest were used to grow various grains and there are still lots of wild berries to eat. Our very existence though would have depended on fish from the rivers, deer, pig, hare and virtually any bird including the eggs.This of course makes a complete nonsense of vegetarian and vegan diets.
Vegetables in the garden plant series, Roger Phillips and Martyn Rix 1993 ISBN 0 333 62640 0 (Macmillan) is very good on origins and often shows photos of the ancestors. Most of the series have been remaindered now, I picked up "Herbs" for £4... instead of the original £17 ;D
It's not only vegetables that have changed, but the domesticated animals we eat today.I don't think our ancestors would know the animal i get my pork chops from or the veg on my plate to accompany it.