In Ray Jardine's "Beyond Backpacking" he describes his way-of-life porridge. He says it consists of equal portions barley, oats, millet and corn, all in their raw "sproutable" state, germ and bran intact.
Where does one get truly whole grains like this? Ray says the only way to know for sure is to grind them yourself. But alot has changed since then, do places like Whole Foods Market carry this stuff now?