upscale austrian cooking
Try Chef Hannes in El Segundo. The namesake of the restaurant is Chef Johannes Kreitzler, and he does a Mitteleuropean/California fusion that works very well. He has a deft hand with vegetables, the soups are splendid, and the prices are very reasonable. The only drawback is that the place can get a bit loud on weekend evenings. Reservations are a very good idea, since there are only about twelve tables. A hint - If you go there and the place looks full, ask about the outdoor patio in the back. It is in El Segundo so there is some airport noise, and it can get a bit cold in late evenings, but the patio is actually a nice place to eat.
Spago Beverly Hills has some Austrian inspired dishes.
Also, Knoll's Black Forest Inn, in West Los Angeles serves excellent German food in a very comfy setting. The wood paneled bar has a very cozy table near the fireplace and their patio is one of the prettiest in town.
There's also Rockenwagner in Venice and Shatzi (Arnold Schwartznegger's place).