Hello Maangchi! One of my favourite Asian treats is red bean filled steamed buns. I come from Bosnia and Herzegovina and red beans just recently became available in my country. I was so happy and I immediately started lookig for recipes, but once I found your recipe for jjinppang I knew it would be guaranteed success! So, here is the cross-section. It was amazingly delicious and fluffy, just perfect! PS I like smooth red bean paste, so I used food processor to make mine smooth instead of chunky.
Awesome! Congratulations!