Culinary Backstreets lunch hunting tip #1: Wander into one of Istanbul’s numerous districts of small commerce and find yourself on a small street with a shoe cobbler, a knife sharpener and hardware shops.

The fatty torik – the Turkish name for a large, mature Atlantic bonito, similar to the little tunny – courses the straits of the Bosphorus and the Dardanelles for just a short period each year in November and December. Yet the people of Istanbul eat it year-round by preserving the fish in a light brine, something it seems they have been doing for millennia – the Byzantines even minted coins with an image of the fish. Making lakerda is more than a means to preserve bonito for the rest of the year, however; it’s part of the city’s culinary instinct. Around 5 a.m. one recent morning in Yenikapı, yellow rubber boots were piled high in front of the one serene spot on the sprawling grounds of the Municipal Fish Auction.

Farooj al Zaeem is, pretty much, the best kind of restaurant made to resemble the worst kind of restaurant. If the neighborhood – one of Beyoğlu’s most unkempt snatches – doesn’t send you running, then the look of this place, like a knockoff polo shirt with misspellings, will signal that something here is not right.