WebMD: A massive recall involving nearly 4 million pounds of salads, wraps, and other products has been traced to a common supplier of onions and other vegetables. McCain Foods, headquartered in Canada, announced that its fire-roasted, caramelized, or sauteed frozen vegetables and fruits made at its Colton, CA, facility may have been contaminated. The products were sold in Trader Joe’s, Whole Foods, Walmart, Kroger, and Target stores across the country.