Comment by vector_spaces

OK, I'll bite. In this particular case I personally would have said "a restaurant of your national cuisine" or even omit the adjective altogether since it's somewhat obvious from the preceding conversation what you mean.

My main qualm with this usage -- aside from being dated -- is that all cuisines are ethnic, but singling out the hypothetical migrant's as such implies that it is particularly ethnic. So in this sense it is a bit othering.

To be clear, I don't write this to call you out for your usage or accuse you -- I'm just answering your good-faith question.

RE your point, I don't agree that it's so obvious -- cooking and running a restaurant are pretty hard regardless of where you are from!