Korean restaurants frequently operate at a high degree of specialization, doing one or two things really well while still offering a variety of standards. I’m slowly but surely eating my way through as many as possible looking for places that go beyond bulgogi and bibimbap. New reviews of two very worthy spots just went up on the Reader Restaurant Finder: So Gong Dong Tofu House on Bryn Mawr is the place for eight varieties of sundubu jigae, soft soothing bean curd soup. Lincoln Restaurant is a tiny, inviting lunch counter that does the basics very well. Now, anyone know a place that does nakchi or poshintang