Golden Giant Amaranth
Huge plants with huge yields of high-quality ivory seed. With good fertility, plants can grow to 10 ft and yield up to 1 lb per plant. Needs a longer season to mature seed, about 110 days. Amaranth was a staple grain over much of prehistoric eastern north America and central America. It is easy to grow and is one of the best survival crops. It works well in a three-sisters-style planting, with the amaranth planted in groups of 3 or 4 with beans growing up the stalk. This tall variety is perfectly sized for pole beans. (Don't try it with single plants or plants in a row--they need to be sown in triangles about 18" on a side.)
Amaranth grain is very easy to process at home. Just hang the plants to dry over a tarp or sheet, thresh, and winnow out the flower bracts and other chaff. However, the fact that you can get at the grain easily means the birds can too. Have a plan in place for using flash tape, aluminium foil, scarecrow, netting, or whatever you need to prevent loss from birds, and harvest promptly. If you just have a few plants, you can tie mosquito netting over the seedheads. Cooked amaranth has a texture like sticky rice. It is great as a hot cereal and as polenta or pilaf, as well as in soups. I have had wonderful amaranth pilaf cooked in beef or chicken broth, too.