Use a Tortilla, and add meat, beans, sauce, whatever you like.Or,get a taco shell, add fish, cranberrys, grapes, ranch, horsradish, cucumbers, deodorant, perfume, sweatysocks, underwear, an elephant...
A tortilla (flour or corn) is warmed or fried crisp in a u-shape. Then it's filled with any one or more of many fillings - ground beef, chicken, vegetables, cheese, sour cream, potato, chorizo,...