When you visit the Gyeongbokgung Palace. You will arrive bysubway station Gyeongbokgung, Exit 5. You will pass the National Palace Museumbefore you get into the the Gyeongbokgung Palace.
There is the café inside the museum. I recommend to taste Leekand Soybean Bibimbap. The taste is so good. It use soybean paste instead ofgochuchang for the bibimbap sauce.