Couple of points which are going back a bit in the thread but I've been away.
You can't fish ham out of a salad and pass it off as a kosher meal.
Kosher meals have to be sealed during manufacture with a Beth Din seal which indicates it's authenticity. A person requesting a kosher meal is the only person allowed to break the seal. If it's been tampered with they quite rightly will refuse it.
Also if you ever used the galley on an ATR you would see that you can't even get a coffee pot over the sink cos there's not enought room. But it has a big hand basin in the loo.