We eat amaranth semi-regularly. Less now than before. Oats, rice and quinoa are our main staples and we buy them in bulk. I'm hoping to replace rice with the amaranth and quinoa that we grow. But it'll take a few years of learning and expanding or growing space.
I've grow potatoes, dry beans, and field corn in the past. I haven't grown any grains as of yet, but I'll be doing much more beans, amaranth, and quinoa this year. It's one of my goals to track my yields, I'll be posting on all of that as the season progresses.