Fair lunch special, $10 gets you one of a few meals and a half pint of certain meals. I always go for the chicken pot pie or shepard's pie. Not super fast service though (3 of 4 petals via Fondu) Read more.
Although the UN Headquarters can be visited on tours, one of the best secrets is the Delegates Dining Room. Despite what its name suggests, the restaurant is open to the public with a reservation. Read more.