Sip Sak’s Orhan Yegen brings a touch of Turkey to the Upper East Side with this sliver of a gourmet shop where his Mediterranean specialties include grilled octopus salad, stuffed eggplant and lamb meat balls, along with a variety of vegan and gluten-free dishes. The brick-walled, industrial-chic market offers counter-serve fare and refrigerated grab-and-go options, plus a counter with six...