Wash the soybean sprouts thoroughly and prepare them.
Slice the green onions and onions thinly.
Put the soybean sprouts, green onions, onions, and pork for bulgogi in a bowl.
Add soy sauce, gochujang, minced garlic, sugar, sesame oil, and pepper, then mix well.
Heat oil in a pan and stir-fry the seasoned ingredients over high heat.
When the soybean sprouts are softened and the pork is cooked, it's ready.