Chipotle Mexican Grill Inc. CMG, -1.54% said Monday that it will test Garlic Guajillo Steak in 102 locations across Denver, Indianapolis, and Orange County, Calif., starting May 3 for a limited time. Chipotle reported first-quarter results last week that beat expectations. Chief Executive Brian Niccol said on the call that pollo asado has been "the most popular new protein to-date," according to a FactSet transcript. Chipotle stock has slumped 16.7% for the year to date.