What is the worlds best vegetable?

Potato, because you can do so much with them. Roast Potatoes. Mash Potatos. Chips. Potato Wedges. Boiled Potatoes ... just to name a few. No I could not live on vegetables alone, it would be a really unhealthy diet due to lack of balance.

I couldn't because I am not a huge vegetable fan. My favorite would be artichoke, but it is to expensive to live off of. A second choice woul be French style green beans, or corn on the cob. I like to steam the corn with butter and garlic salt. I have a micro cooker all I have to do is stick the corn in that, in the microwave with the butter and garlic and cook for 5 min. It's amazing

Ya i could live on vegetables only. My best one would be broccoli or any veges with negative calories.