Last Supper is probably the most original restaurant I have ever been to in Munich. Decorated with a baroque-style of religious images and paintings, that makes a dinner a wonderful experience. They offer three different daily menus which courses can be swapped as one likes. The only disadvantage: the price, it is not cheap.
Gute Nacht Wurst is in Klenzestrasse 32 and very popular during the weekends for a late dinner snack after some drinks or beers in Gärtner Platz. A must-try is their Currywurst with pommes.
Do you have any other recommendations for eating out in Munich? Let me know :-)