See gastronationalism. It's not "a very specific usage." Black and Kurdish nationalism are political movements. You're welcome to say Persian national cuisine,

See gastronationalism. It's not "a very specific usage." Black and Kurdish nationalism are political movements. You're welcome to say Persian national cuisine, but that can be interpreted in a number of ways. I wouldn't advise it. Anyway. My point is that ethnic cuisine is not easily replaced by another term.