Should you find yourself schvitzing in Koreatown, pop into Dons Bogam BBQ for a bowl of icy-cold naengmyeon. Slicks of fat on the surface of the bracing, chilled beef broth make a tangle of chewy arrowroot noodles glisten. The nearly black noodles are topped with Asian pear and a hardboiled egg that adds further chew to the dish. There’s even more Brooklyn flavor in the demeanor of the folks running the counter at No. 7 Sub inside the Plaza Food Hall, which lends cred to what is essentially a food court for the rich. In keeping with the menu of wacky sandwich combinations (short ribs and grape jelly), the kiosk features a chilled pea soup packed with roasted onions, ham, and pickled blueberries. The astringent fruit pops with a pleasant sourness.