The Jerusalem Post has an article on it, which doesn't get its kosher laws straight. For instance, they mixed up bishul goy, cooked by a non-Jew, with the laws concerning wine.
Orthodox Jewish law prohibits eating some foods cooked by gentiles so as to prevent the development of close relationships between Jews and non-Jews that could lead to intermarriage and assimilation.
The writer should have stuck with the interview and not tried to add extra things. Kosher food/cooking must be supervised all the time. So if your cooks and fire-lighters aren't Jewish, are there Jews in the kitchen at all? The report about one restaurant was very frightening. It said that the Arab workers had the rabbis terrified, so even though officially there are supervisors, they have no real active authority.
I wonder which restaurants Rabbi Eliyahu Schlesinger and Rabbi Benny Lau eat in. And I also wonder if they would continue eating there after paying surprise visits to the kitchen.