Northwestern University dining hall workers celebrating new contract as part of the students' living wage campaign."They took our knives and gave us scissors to open bags of frozen food. I want my knives back so I can cook again." That's what a kitchen worker at a prominent university told me recently at one of a dozen of gatherings around the country convened by our union, Unite Here. The idea was to bring food service workers and college students together to discuss the intersection of food and work in anticipation of Food Day, a national day designed to "bring together Americans …