Delia’s Tamales, a South Texas food institution with a popular West San Antonio location, has been sued by 25 former employees, who allege the company committed fraud and age discrimination. In a lawsuit originally filed Aug. 31 in Hidalgo County District Court, the plaintiffs argue the McAllen-based company cooked up a scheme to help employees acquire bogus Social Security numbers so they could work there. Delia’s officials withheld federal Social Security taxes from the staffers’ paychecks but kept the deductions for the business’ coffers, the complaint states.