Original varieties of tomatoes from South America are believed to have been small, like today's cherry tomatoes. Today's large, plump tomatoes are the result of years of selection. Sean Gallup/Getty Images hide caption

itoggle caption Sean Gallup/Getty Images

The green bean salad with snow peas, coriander and mustard seeds and tarragon, from Yotam Ottolenghi's Plenty. Ottolenghi's column, "The New Vegetarian," has run in London's Guardian newspaper since 2006. Jonathan Lovekin hide caption

itoggle caption Jonathan Lovekin

Steven White (right) helps serve dinner at the Salvation Army soup kitchen. Pam Fessler/NPR hide caption

itoggle caption Pam Fessler/NPR

The small print in the bar at the top of the Corn Pops box is an example of industry's voluntary approach to enhanced nutrition information. Marina Dominguez/NPR hide caption

itoggle caption Marina Dominguez/NPR