Hello All,
Bad news first: we are nearly on our own when looking for information on interesting local restaurants in Istanbul Turkey. The guide books clearly look at each others' notes on the same tired old tourist traps. If I read one more review of Pandeli I may scream. Web-based resources are extremely thin and usually flooded with ads. I tried them all and the only reliable voice I've found is
www.istanbuleats.comGood news: man there is a lot to eat in Istanbul. This cuisine is so rich and diverse, a week in Istanbul doesn't even scratch the surface.
I am a real fan of food from the Black Sea region of Turkey, up toward the Caucasus. Istanbul has some great places to try this food. In Beyoglu there's Pera Sisore up the Bosporus in Ortakoy I tried Pafuli. Pafuli is a bit fancy and service a bit stuffy. but the muhlama (Turkish freid cheese in a skillet) hamsi ekmek (sardine-laced cornbread) and laz boregi (sweet pastry) were right on the money.
It's easy enough to avoid the crumby traps but you'll have to toss the guide books aside and follow your instincts.
good luck!