Once upon a time, if you wanted tortillas, there was only one place to get them: Grandma's kitchen. But now mass-produced tortillas line the grocery-store shelves, and Grandma has hung up her apron. Enter Charlotte Saenz. With a griddle in one hand and arolling pin in the other, she's teaching a new generation how to shake, rattle and roll. In a series of cooking classes offered through the Aurora recreation department, Saenz walks students through the basics of quesadillas, burritos and enchiladas. But first they must master the art of the flour tortilla. Students not only learn to make their own tortillas, they eat them, too. "Many of them get pretty good," Saenz says of her students. "One woman even came up to me and said, 'You saved my marriage.'"