I sympathise. A veggie g.f. actually collapsed from malnutrition on a trip in Turkey. Some years later, forewarned by that experience and the similarities of cuisine, I warned another veggie g.f. that she was not going to survive on raw Greek salads, honey and yoghurt. Sure enough, down she went.
When I had a go on the D.Telegraph internet dating site I specified that interested parties, when travelling, “must not be backed into a corner by a local cuisine”.
That was not the principle problem. My GP told me that I’d get loads of replies but “Look out for the bunny-boilers!” It was scary!