Help with Nigerian snack name

It's October and I'm in Austin, Texas, visiting family. Daughter Abena just gave me a snack (grain? seed?) she bought at a Nigerian store. It  looks like barley or buckwheat, or a fat kind of rice. Can any of you tell me what it's from, and its name--English, indigenous, and/or scientific? Also, any more information about how it's prepared and eaten is welcome. As always, thank you.