We can't quite figure out the ownership status of ZuZu. It used to be a chain; now it isn't. Each of the restaurants bearing the name ZuZu in Dallas has a different owner--or so we were told--and some have different menus. Well, we can vouch for three places named ZuZu, one in Addison and two in Dallas, and all carry the original ZuZu menu of "handmade" Mexican food. And all are superb, much better than you'd expect for a counter-service joint. Try the grilled, marinated chicken or the "Poncho Dinner," which consists of a chicken enchilada, a beef taco and a chicken flauta. Everything appears to be made fresh, and you have a variety of salsas to accent your meal, including a bracing tomatillo version. Wash it all down with fresh-squeezed lemon-limeade.