The word asada itself translates to roasted/grilled. It is a method of cooking meat that imparts fantastic flavor. The classic taco filling, carne asada, is sliced skirt or flank steak marinated in a mixture of citrus juices (orange, lemon, lime) salt, pepper, cilantro, garlic and other add in ingredients that vary by recipe. Marinades, whatever type, usually have acidic ingredients as the base. The marinated steak is then grilled until tender and juicy.