01 - Combine soy sauce, brown sugar, sesame oil, minced garlic, grated ginger, ground black pepper, and rice vinegar in a large bowl. Whisk thoroughly until sugar is dissolved.
02 - Add thinly sliced beef to the marinade, ensuring full coverage. Cover and refrigerate for at least 30 minutes to infuse flavors.
03 - Heat a large skillet over medium-high heat. Add marinated beef and cook in batches for 3–5 minutes until caramelized and cooked through.
04 - Divide steamed rice among serving bowls. Top each with cooked bulgogi beef, carrot, cucumber, green onion, sesame seeds, and a spoonful of kimchi.