The Earth Nut pea is a small climbing perennial, Native to Europe and Asia. It is a week climber, so it will need a little help.
What you want is the root. It is edible raw and cooked.
Earthnut pea takes a short time to cook, and is only added towards the end of the preparation time – this is because it cooks rapidly and adding it late enables it to keep most of its nutritious elements. Often combined with chopped and minced veggies, to make a wonderful soup.
This is something that you will need to take to your local greenhouse about.