WHAT ARE SOME OF MEXICO'S STAPLE FOODS?
http://www.google.com/search?q=staple+food+mexico&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7
The library.thinkquest website is the most concise.
=)
I can say this right off of my head.
Tortillas, beans, tomatoes, etc.