Avila's El Ranchito at Santa Ana - awesome mexican/american food. Kick ass margaritas and great food
OK.. maybe not (do go on a different occasion though)
Few recommendations in OC
Andrea's Restaurant at the Pelican Hill - absolutely amazing food and view of the pacific coast and the golf course right in the heart of beautiful Newport Coast.
Javiers at Crystal Cove - also at Newport Coast. I have not been there personally but looks like a great spot with a great view.
Orange Hill Restaurant in Orange, CA. Slightly less bling but the view is great and the fire pits + a bottle of wine outside looking at most of western OC is great