from: http://www.geocities.com/napavalley/7035/tortilla.html:
Corn Tortillas
Unlike four tortillas, corn Tortillas usually do not contain any added oil. They can be made with corn flour, but the traditional recipe uses something called masa harina or masa flour.
Masa harina is made from corn soaked in lime and then dried and ground into a powder. I know it doesn't sound very appetizing, but masa is a traditional ingredient in many dough containing Latin American dishes, such as tortillas and tamales. Masa can be found in any Hispanic neighborhood and some larger supermarkets as well. The brand I usually buy is made by Quaker, an American company. Many hot sauce catalogs also sell masa, though usually at an exorbitant price. If you can not find masa, try the recipe with regular corn flour (not corn meal or corn starch). The results are acceptable, but they are not authentic in taste and usually tougher in texture than tortillas made with masa.
Google Search:
Recipes Using Corn Tortillas:
http://www.thriftyfun.com/tf28427895.tip.html
