I must confess. The OP asks a fairly basic question about when/if/what food will be served on the flight. A flight that is overnight about about 8 hours.
The responses have been less than polite and downright critical that (s)he shouldn't wait for the flight to land, so to eat in Berlin, people talking about bringing Swiss Chalet, pizza and a bucket of KFC onboard.
What is so wrong with simply answering the question instead of lecturing the OP on the finer points of Berlin restaurants. They just want to know when/if they get a meal.
I've never flown this route (I avoid Rouge) so I can't answer, but lets try not to insult the OP any further.