In a medium bowl, combine the beef, garlic, soy sauce, sesame oil, sugar, black pepper, and mirin, if using. Mix until the beef is evenly coated and let marinate for at least 30 minutes.
Heat the vegetable oil in a large skillet over medium-high heat. Add the marinated beef and cook until the beef is browned and cooked through, about 5 minutes.
Add the onion, carrot, and bell pepper to the skillet and cook for another 3 minutes, stirring occasionally, until the vegetables are lightly browned.
In a small bowl, whisk together the gochujang, honey, and sesame seeds. Pour the sauce over the beef and vegetables and cook for another 2 minutes, stirring occasionally, until the sauce is thickened and the vegetables are cooked through.
Serve the bulgogi with steamed rice and/or kimchi.
Interesting Facts
Bulgogi is a classic Korean dish that is enjoyed all over the world.
The dish is traditionally made with thinly sliced ribeye or sirloin beef, but can also be made with pork, chicken, or even tofu.
The marinade for bulgogi typically includes soy sauce, sesame oil, garlic, sugar, and black pepper.
The dish is usually served with steamed rice and/or kimchi.