I have emailed my new BBF at the EU to ask him/her/they about meals made with quorn instead of meat. They are 100% vegetarian but when cooked look exactly the same as stuff what normal folk eat.
I use 50/50 mix of mince/quorn now in my cooking normally...better for you; cheaper; save the planet etc etc
I asked him/her/they how I can prove it if we are stopped.
We'll see what he/her/they say...