On a pot, put a handful of soybean sprouts, drizzle mirin all over, place the rice on top, then cover.
Place it on the stove, put it on medium heat, and let it cook for 5 minutes. Keep the lid closed.
While cooking, chop the scallions, onion, and pepper. Then, in a saucepan, combine it with soy sauce, water, sesame oil, sesame seeds, and gochugaru.
After 5 minutes, open the pot and add the sauce on top of the rice. Add the sauce gradually, according to taste.
Mix the rice thoroughly, serve, and enjoy!