Strategically dotting every neighborhood, this chain of restaurants endures because of cheap prices, cheerful service, and a menu buckling with dishes that will shock and awe your dietician. So, yes, caldo de res will be gravid with beef, cabbage, and potatoes. Flour tortillas will be partnered with butter. Enchiladas will be offered in at least seven variations, from verde to bittersweet mole. And there will be Tex-Mex, in the form of chile con carne. For continuous comfort, breakfast is offered all day. (9/13)