To be a freegan is to be a person who avoids exchanging money for food and other items — you recycle what is still good instead. To accomplish this, however, one has to be creative, maybe even nocturnal. “After the markets close, the shopkeepers put food on the sidewalk,” explains Aliza Eliazarov, who discovered this world of freeganism while on a newspaper assignment about dumpster diving. “Most of the food doesn’t even make it into the trash because people are there waiting for it.” Eliazarov, who has a degree in environmental engineering and an interest in conservation and preservation, signed...