Hah! That's an easy one to answer. Over here in the Netherlands we have roughly the same prices. I think 11E if it is not a combo is very realistic. In the Netherlands you usually pay something like 25E for three basic courses; starter, main, and desert. But then it is almost always without the drinks.

We have several of those "all you can eat" places where you can maybe get the drinks included. But then the food will not be of the quality that you are displaying in your picture. Then it's more like rice and saté and a whole bunch of beers to make it go down a little smoother haha :)