Standard cafeteria food. Deli sandwiches, burgers, hot dogs, a couple soup selections, pies. You get the idea. Nothing fancy. Nothing terribly interesting. But it is fast. The most important thing is to get some food and get back out in the mountains.
Just try not to arrive behind a tourbus group, then it might be a bit slower. We arrived just in front of a tour group and were in and out within 15 minutes.