Pickling, smoking and grinding are stand-out food trends from the 2015 show, which was held May 16-19 in Chicago. With over 2,000 exhibitors, celebrity chefs, food professionals and others vying for attention, it’s easy to be overwhelmed at the National Restaurant Association (NRA) 2015 Show at Chicago McCormick Place. Carole Kuhrt Brewer of Show Me Chicago…