When I was in Korea, a Korean American soldier took me beyond the shops that served soldiers...and to this large open sided tent with people standing at counters around the perimeter. The grill was in the middle. Sort of Korean ‘fast casual’. I have no idea what we ate, but it was really good.
My first time there I was at I Corps (ROK/US) Group which was half Korean soldiers and half American. Many of my Korean officers took me home with them for dinner.