Prepare the mushrooms by washing off the dirt.
Tear the oyster mushroom into strips and thinly slice the Bella mushrooms.
In medium-high heat and a bit of oil, place the mushrooms on the pan with ample space even, then season it with salt.
Cover the mushrooms, leave them to render, and wait until all moisture has evaporated.
Meanwhile, cook rice or heat up your leftover rice and make the sauce.
To make the sauce, combine soy sauce, vinegar, plum sauce, sesame oil, sesame seeds, sugar, gochugaru, scallions, and onion. Mix thoroughly, taste, and adjust according to preference.
Once there is little moisture left, mix the mushrooms until all sides are golden brown.
To plate, make a bed of mushrooms, place a bowl of rice on top, and drizzle the sauce on the rice. Mix it thoroughly, and add more sauce as needed.
Serve and enjoy!