Ooo, this is exciting, I so rarely get to be the random dumbass crawling out of the woodwork to provide a statistically-unlikely counterexample to an otherwise sound point!
I've been really enjoying eating soybeans. Absurdly good source of protein (yes, even for a bean), dirt cheap, decent source of fiber and a bunch of minerals, and pretty easy to just drop in a pressure cooker and eat however you like once it comes out.
Can't say I eat a lot of field corn or hay though.
Field corn is made into chips and tortillas, not to mention also processed into corn syrup. Cornbread, polenta...
Hay is the stalk of a grain plant. We take the grain off the stalk and make it into flour. A main ingredient in bread and pasta/noodle.