When I used to work in Korea couple years back, I used to eat the above combo for breakfast. Actually I used to eat two of these sandwiches.
Koreans love triangle sandwiches and don’t like the ends.
This particular sandwich I bought at Korean 7-Eleven for 1,600 won, about $1 USD.
It’s about 10 times more fresh and delicious than sandwiches sold here at 7-Eleven in the U.S..
You can also find these sandwiches and other derivatives of the triangle sandwich at local bakeries, which should be open in the mornings.
Unlike the U.S., most restaurants don’t open in Korea until 10AM or so. There’s not really a morning restaurant culture in Korea so most people eat at home. Although the night food culture is entirely the opposite.