1. Preparation
Thinly slice 500g of beef sirloin against the grain into strips.
In a mixing bowl, combine 4 tablespoons of soy sauce, 2 tablespoons of sugar, 2 tablespoons of sesame oil, 2 tablespoons of rice wine or mirin, 1 tablespoon of minced garlic, and 1 teaspoon of grated ginger.
Add the sliced beef to the marinade, ensuring all pieces are well-coated. Let it marinate for at least 15 minutes, or up to 2 hours in the refrigerator.
While the beef is marinating, slice 1 medium onion and 1 large carrot into thin strips. Chop 2 green onions into 1-inch pieces.
2. Cooking
Heat a large skillet or grill pan over medium-high heat.
Add the marinated beef along with all the marinade to the pan. Cook for about 5-7 minutes, stirring occasionally until the beef is cooked through and slightly caramelized.
Add the sliced onion and carrot to the pan. Continue to cook for another 3-4 minutes until the vegetables are tender.
Add the chopped green onions and stir for an additional minute.
Serve the bulgogi hot over steamed rice, with lettuce leaves for wrapping if desired.