If I were travelling with kids on that flight I would forget the too-late supper and bring my own breakfast. Even bag of croissants from the Dollarama would be better than the dreaded banana bread, and there would be enough to fill you up instead of just whetting the appetite. Of course you could bring whatever you want for brekkies, though in some countries you wouldn't be allowed to leave the airplane with it. I think the EU is fine though.

The point is that you won't be hungry after takeoff but you will want more and better food than AC provides before landing. Bring it yourself to eat shortly before landing, especially if your post landing day is tiring.