Prepare blueberries and chocolate thoroughly.
Melt a little butter in a pan.
Add the blueberries to the pan and lightly sauté them.
Add the chocolate and mix with the blueberries until melted.
Cut Onau (glutinous rice cake or traditional Korean rice cake) into bite-sized pieces.
Add the Onau to the pan and stir-fry all ingredients together.
Serve on a plate to finish.