What is oldest known vegetable?

It's difficult to definitively say which vegetable is the oldest known, as there are different interpretations of what constitutes a "vegetable" and our knowledge of ancient diets is limited.

However, some candidates for early domesticated vegetables include:

* Peas: Archaeological evidence suggests peas were cultivated in the Near East as early as 10,000 years ago.

* Lentils: Like peas, lentils were also cultivated in the Near East around 10,000 years ago.

* Chickpeas: These legumes were domesticated in the Near East around 8000 BC.

* Pumpkins: Evidence suggests pumpkins were domesticated in Mexico around 10,000 years ago.

It's important to note that this is just a starting point, and the list of early domesticated vegetables is likely much larger.

Further research and discoveries might reveal even older vegetables, making it impossible to definitively crown one as the "oldest known."