1. Mexico's everyday bread, the unleavened tortilla is round and flat it resembles a very thin pancake. The hand-shaped tortilla can be made from corn flour (masa) or wheat flour, but is always baked on a griddle (comal). It can be eaten plain or wrapped around various fillings. Tortillas are the base for burritos, tacos and a multitude of other dishes. Both corn and flour tortillas are sold prepackaged in the refrigerator section of most supermarkets. 2. In Spain, the word tortilla refers to a thin omelet, the traditional version of which contains potatoes and Spanish onions. Other ingredients that may be used include ham, chorizo and peppers.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.