Plants where all of it is edible

Turnips, beets. Nasturtiums too. Chickory. And sweet  potatoes?  I didn’t know the leaves were edible!

Are there lettuces where you also eat the roots? I know that there are some you eat the flower stalks, but don’t know which ones.

Is there a list? Except obviously you can’t keep them growing, it always seemed to me  to be the most efficient type of plant to grow...

I believe virtually all parts of Moringa are edible.  It can be grown as an annual in a cold climate, but must be started in warm temperatures.  http://www.fao.org/traditional-crops/moringa/en/

Radishes and carrots spring to mind.

Chayote

This is a great topic!

I am probably the only person who eats spaghetti squash rind.  I roast it like acorn squash.

I feel that almost all parts of vegetable plants can be eaten though the problem is that some parts are not palatable.  Most roots and stems are too stringy.

This year the deer ate all the leaves off the tomatoes, peppers, watermelons and squash.  They must have enjoyed them though I have no desire to eat any of those leaves.

https://permies.com/t/58961/culinary-tomato-foliage

In Mexico, Corn Smut is a delicacy.  Our corn got it one year and I had no desire to try it.

https://permies.com/t/124120/Corn-Smut-huitlacoche

https://permies.com/t/35173/eat-corn-smut