Add the mushrooms to boiling water and cook for 10 minutes over medium heat.
Meanwhile, cut the onion into half rings. Heat a frying pan with vegetable oil and fry the onion for 5 minutes over medium heat.
When the mushrooms are ready, use a slotted spoon to put them into a deep container. Don't rush to pour out the mushroom broth - you'll need it.
Cut the bell pepper into strips and add to the mushrooms.
Grate the carrots on a coarse grater, chop the garlic finely. Add everything to the mushrooms and sweet pepper.
Add fried onions and chopped parsley.
In a separate container, mix 1 cup of mushroom broth, salt, sugar, Korean seasoning and vinegar.
Pour the resulting marinade over the mushrooms and vegetables and mix. Cover the mushrooms with cling film and refrigerate for 4 hours.
Garnish the finished dish with sesame seeds. Enjoy your meal.