I thought at first when I read this post that it sounded familiar and that I might have been there. Then I recalled that my experience some years ago was at a place in the main train station at Frankfurt. It didn't rise to the level of a restaurant, just a place for relatively quick foods already prepared--and for beer, of course.

DH had the ham hocks and sauerkraut. We also had some variation on noodles and a gravy. Other things to try but we couldn't manage them all. We probably would have moved in, if they had only let us.

If there is a restaurant at the airport that good, then it would be good indeed. ^