Kaefer's in Frankfurt Airport
There doesn't seem to be a ton of info on Frankfurt Airport, so let me report that on a recent trip a friend and I stopped in at Kaefer's restaurant. I had jellied pork with green sauce and a side of fried potatoes and bacon; perfectly good and satisfying without being anything special. The potatoes and bacon were the best part. So if you need a meal in Frankfurt Airport and have time to sit down (the meal took about an hour all told) I can certainly vouch for Kaefer's.