The Plaza Restaurant is among the least value per credit on the Dining Plan (which is probably why it was relatively easy to get reservations there). If that's what you're in the mood for, then that's great, but there really is no comparison to most any other TS restaurant. It's really just one step above CS in my book. Good CS, but still CS.
Appetizer options are "soup of the day or tossed salad". That's it.