Multi-Year Quest to Develop Better Tasting, Preservative-Free Tortilla Complete; Company’s Food Now Includes Only 51 Real, Delicious Ingredients DENVER, 2017-Mar-30 — /EPR Retail News/ — Chipotle Mexican Grill (NYSE: CMG) announced that it has become the only national restaurant brand with no added colors, flavors or preservatives in any of the ingredients it uses to prepare…