Yes, you can eat them. There is no 'restriction'.
The fact 10 foreign people can run a local restaurant to their culture in one foreign nation per 10,000 people of native population can have a restaurant never can potentially justify to bring all foreigners in to destroy a country.
The above thinking and justification is just retarded, and it's made to relate things that people like (Foreign food) with things people utterly hate, which is to go extinct.
There is no logical connection in either of this. Low percents like 1% of foreign people, or 0.5% per civilization, who work peacefully, can 'bring new things' into a culture, and not destroy it.
Whites likewise have brought "Italian" and "Greek" cuisines all over the world, to the East as well, because they were formally going there and without desire to extinct the locals. On the other hand, they never tried to take over anyone else's country either.
Tourism as a thing is also based on the above, and guess what, people didn't go extinct for centuries, because it wasn't related to mass migration and other deadly practices. Chefs for example of the highest caliber always travel to foreign nations to learn more things about food, but this doesn't make their work genocide anyone.