That is, either been to the foreign country and eaten the national dish there, or had the dish been cooked by someone who is from that country.
How did the 'authentic' dish compare to the kinds of food you'd get in a restaurant? For example, having Chinese take-out compared to having home-cooked Chinese.
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I lived in Germany for almost a decade, and traveled to many European countries. Authentic food tastes way better in its home country. Also, why does European Coca-Cola taste far better than American Coke?