Everything was closed except for the guys who sell $80 salads. No McDonald's, no Sbarro, just the sandwich-and-salad place. Grossly overpriced and nothing interesting.
I walked throughout the facility looking for food. Saw an open door and complained to the people in the office there that this was LaGuardia, not some small-town airport that should close up shop at 8pm...
They took pity on me and let me take some of the ziti from the huge vat that they had. :-)