I'm quite fussy and wondered if anyone had advice which special meals would give me the best chance of having something I can eat?

Outbound is band 2 lunch which seems to be salmon or halloumi. I would be fine with halloumi, if I preorder the vegetarian meal would I be likely to get that or something completely different?

Inbound is band 2 breakfast. If I want to avoid egg and fish, what would my best bet be? I wondered about hindu vegetarian?