Yeah pea soup! Absolutely my favourite in winter time and luckily the closest thing we have for a national dish.

On the Korean thing: Indonesian and Korean palates differ quite widely... While both are very spicy at times Korean food seems (to me) a little different because there's more salt involved, as well as all kinds of fermented stuff like Kimchi. As a matter of fact, Korean food (and the horrible Korean dramas and pop music, K-pop) is all the rage now in Jakarta and Korean restaurants are everywhere. I visited some with a few Korean guys from my language course and was quite positively amazed by the wonderful Korean seafood. Plus, they enjoy it the right way, with a lot of beer and Soichi (a gin-like substance).
One of the "perks" of Indonesia as a primarily Muslim country is that people spend all the money they would otherwise spend on booze on food, so there's an insane amount of restaurants, eateries, road side stalls etc. for all kinds of wonderful food.