Veronica Garza didn’t know what “grain-free” meant in 2014.⁠ ⁠ “I remember looking that up at the time, like, ‘What is grain-free?'” Garza said. “That means no flour, no corn. That was a lot of things that were off the table for me.”⁠ ⁠ Garza was a professor at the University of Texas at Laredo when a series of autoimmune disorders had her overhauling the way she ate. One thing she had to stop eating was wheat flour tortillas. Letting that go hurt for the Mexican American woman from Laredo, Texas.⁠ ⁠ “That sort of made me feel disconnected from my culture being a Mexican American, not being able to fully participate in food,” Garza said.⁠ ⁠ Garza decided to experiment in the kitchen to see if she could make a grain- and gluten-free version of a tortilla. That was the beginning of Siete Foods, a company that has ballooned into an empire of Mexican American products, from tortillas to chips and cookies. Last week, PepsiCo announced it was acquiring the company for $1.2 billion, the food ...