Maybe you've dined at Elizabeth and tried the things Iliana Regan forages around the Chicago area. Or maybe you've eaten something fantastic and never really thought about the fact that a forager (like this one) is responsible for it coming to the restaurant in the first place. Either way, having made a movie out of foraging with her, we recommend the experience of foraging with Nance Klehm, a passionate and decidedly opinionated booster of the oldest way of finding something to eat; you'll never look at a vacant lot in Chicago the same way again. She has a seasonal series of "talk and walks" that start at the Jensen Room in the Garfield Park Conservatory, beginning Saturday with a spring edition from 9:00 a.m. to 1:00 p.m. and continuing with a summer edition August 3 and a fall one October 5; she'll also do a shorter one in Oak Park on May 5. The one tomorrow is $55; get more details here.