Mobile QR codes help commuters find dinnertime recipes Allrecipes.com placed ads with QR codes in a downtown Los Angeles transit station for riders to find a recipe for that night’s meal. By Matt WilsonMay 24, 2012 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.