In Ghana, Nigeria, Togo, Angola and Cameroon maize is a staple, yet the earliest mention of maize in west Africa comes from a Portuguese document that lists it as being loaded on to slave ships bound for Africa.
It's hard to imagine a civilization without onions; in one form or another their flavor blends into almost everything in the meal except the desert.
To us in Asia, rice is such a staple, we take it for granted. I didn't even think about how I made it until I came to the Western world.
Bread is the staff of life.
Rice is the best, the most nutritive and unquestionably the most widespread staple in the world.
Without bread all is misery.