For a cheap and easy meal, this canteen-style restaurant invites you to help yourself to petite bowls of freshly prepared (and spicy) Hunan dishes from the counter, to be eaten with rice (¥2). First choose from stewed taro, red-braised pork, stir-fried greens, baked fish and more, then pay and take your seat. No menus required.
It's opposite a 7 Days Inn just off Dongmen Nanlu.