On my recent first visit, I ordered the lunch menu (which conveniently comes in two sizes). However, I couldn't tell you exactly what that consisted of: Organic somethingorother with a side dish of all-natural whatchamacallit. Despite not being able to identify my food, it was all good once I had figured out which parts were sweet and which savoury.
The atmosphere is just great, and I'll be sure to return for some more delicious mystery food soon. Or maybe next time I'll ask what it is.

Don't be fooled by the fact that it looks quite deserted and boring from the outside: Not that the Yang Haus is a trendy spot by any means, but it's quite large and lively inside, and they have a nice glass-roofed courtyard. The food is cheap (5-6 Euros for a lunch menu, 7.50 at the All-You-Can-Eat buffet) and plentiful, and there's a huge selection -- I swear the menu weighs at least a kilogram!