There is the "çi börek" from Eskisehir in Turkey, a fried pastry with minced meat inside, where they use actual onion juice (juicing the onion like you would juice an apple, basically) to season (and also partially cook) the meat.
"National dish" is one of the silliest things nationalism has to offer. Food does not have nationality.
It doesn't in current, cosmopolitan world, but for centuries different cultures had original dishes not seen elsewhere. We still call such dishes that originated during these times "national". What's wrong with that? It has nothing to do with political ideologies. In English "national" might sound a bit strange and I see "traditional" used more often, but in many other languages it's literary called "national dish".