Just to clarify: Are you asking about on moutain places to eat lunch while you're skiing? If so, there really isn't much choice. At Deer Valley, there is no "town," so you have to eat lunch on the mountain. They have 3 or 4 places, most of which are pretty good for on mountian food, but there are no "unique" spots. Park City skiing is closer to a town but, unless you leave the mountain, once again, you are stuck with the 3 or 4 on mountain places.
If, on the other hand, you're talking about dinner, there is really nothing right by Deer Valley, but there are a ton of places in Park City. Let us know if you want some recommendations there, but price range, food type, etc. will help.
Jonah