SNIPPETS - I am a FT professional working mum in London (whatever that qualifies me as on this site, I'm not sure, but you mention you are also this so you know, I'm trying to make a connection with you).
I make a lot of freshly prepared food for my DC's, most of which I do in bulk and freeze.
I'll tell you something that might possibly of interest:
When my DD, my PFD, was about 12 months old, I had just decided she could drink something other than water or milk. I had bought a bottle of organic baby juice to water down. DD liked it. All good in the hood.
My mum was doing some shopping for me the next day and I asked her to buy another bottle of this juice. She came back with the exact same bottle but it WAS NOT ORGANIC.
Do you know what I did? I fucking made her take it back and exchange it.
Now, I was actually saving that up for the next anecdotal PFB thread, but it is my gift to you to try and make you see, just a little, where everyone is coming from.
It's not that you don't have a right to expect your employee to do as you ask. It's not that anyone can argue pre-packed food is better than freshly prepared. It's your refusal to accept that what your nanny fed your DC is actually a perfectly decent, nutritionally sound meal and that your original OP was most definitely an over reaction.
I tell you the above story as I can well imagine, if I'd discovered MN with my first child, I would have done down in a blaze of glory with a similar thread. Probably I'd have posted about the fricking apple juice issue.
But now, nearly 3 years on, another DC in the mix, I have got a great deal more perspective on the issue. I'm telling you now, (particularly if you plan to have any more kids)once your DC hits 2 years old (and goes neophobic and stops eating everything they have previously enjoyed) you will be reaching for the fishfingers, sausages, M&S kids ready meals and be so bloody grateful that they will eat some pre-packed ravioli with some semblance of a vegetable sauce it's not true. Trust me - I have been in your shoes...I am no longer in those shoes.
These are just facts of life and parenting. The other MNetters on this thread are just speaking from their varied and infinite experience.
I strongly advise saving this thread and revisiting it a year from now and seeing if you really, truly still feel as strongly as you do about that packet of raviloli.
If you do, we will all come back and give you a virtual sainthood.