Food hygiene is an important WASH and nutrition issue and this literature by the USAID FANTA project looks very useful:

Literature Review on Effective Food Hygiene Interventions for Households in Developing Countries, Aug 2015. Authors: Monica Woldt and Gerald G. Moy, FANTA.
Full text: goo.gl/t7xUCQ

This review specifically focuses on household-level food hygiene behaviors that result in infection with pathogenic microorganisms that cause diarrhea through the fecal-oral route, given the high burden of diarrheal disease in developing countries for all segments of the population and the contribution of foodborne illness to diarrheal disease.