What does the cheeseburger say about our modern food economy? A lot, actually. Over the past several years blogger Waldo Jaquith (http://waldo.jaquith.org) set out to make a cheeseburger from scratch, to no avail. “Further reflection revealed that it’s quite impractical—nearly impossible—to make a cheeseburger from scratch,” he writes. “Tomatoes are in season in the late summer. Lettuce is in season in spring and fall. Large mammals are slaughtered in early winter. The process of making such a burger would take nearly a year and would inherently involve omitting some core cheeseburger ingredients. It would be wildly expensive—requiring a trio of...