I actaully used to bake with that alot when i lived up there. Can you detect any hint of the amaranth taste? I Have some growing , and I've hear malted or unmalted it can have a really great nutty flavor.
I would totally try this recipe if i oculd get my hands on those grains still, maybe ill have to make a down south version, or call up some old friends.
Brindle Bear Brewing