When did you take this flight? I hope not recently as the meal is out of date by almost 5 months...
One of the reasons I actually took the a picture of packaging is to send it in to Lufthansa to complain about the date.
Even so the meals was served on china with real silverware and the meat and green beans were moist and really good, one of the better meals I've had on an airplane.
Interestingly on when I flew to the US on FRA - PHL I got a regular meal, its probably just leaving the US since the meals are always from where you come from.
I know kosher is different but in the secular world, isnt Lufthansa known for there for food, maybe they decided to be nice kosher eating passengers as well.