Well this is the nickname of this building, because it has the form of a Hushuur/khusuur :-)
You know the mongolian fried doughnut with meat!
This building is an hotel and it has also some restaurants inside.
From there you have a great view from the Sükhbaatar square.
And of course Genghis khaan! And the parliament :-)
And this is one the restaurant, not bad right?
I haven't seen the hotel but I guess this is pretty luxurious too!