Curtido is a kind of fermented cabbage relish. It is found in the cuisines of El Salvador and other Central American countries. It is made with cabbage, onions, carrots, and sometimes lime juice or vinegar. It is similar to sauerkraut or "kimchi" There is also a variation of "curtido" which is prepared with mayonnaise. Both Curtidos, vinegar and mayonnaise, are highly appreciated by diners as they are indispensable accompaniments of pupusas