Should you find yourself ordering a taco in Mexico City, you’ll be handed a small corn tortilla, folded with grilled or braised meat, chopped onions and cilantro, a sprinkling of fresh white cheese and maybe a thin salsa. No lettuce, and most likely no tomato. You’d also be hard-pressed to find a hard-shell taco in Mexico, but they’re Taco Bell’s top seller. As for the ground beef mixture, the closest you’ll get in Mexico is picadillo, which is usually sweeter and contains raisins. The word taco translates to a wad, or plug, but also can refer to any light snack.