I recently discovered Quinoa, which is quite delicious and very nutritious (it has a balanced set of essential amino acids). It's also pretty cheap. I'm not sure how hardy the plant is though. Googling shows that it's on the short list of foods often mentioned as being able to play a significant role in world hunger.
[update] Probably one of the easiest and most nutritious meals I know is some quinoa, chopped veggies and sriracha. Hell, quinoa and sriracha isn't bad in a pinch.
I discovered it as well, loved the idea of having something so balanced, unfortunately I can't eat it. After trying it, I had a severe allergic reaction, ending in the hospital the first time, and the second riding the pain out for three hours. An odd food to be allergic too, but too bad.
