I start by placing the rib eye in the freezer for about 30 minutes. This firms it up and makes thin slicing much easier. Once chilled, I slice the beef against the grain into very thin strips for maximum tenderness.
In a bowl, I mix grated pear, soy sauce, brown sugar, sesame oil, garlic, ginger, and gochujang. The mixture should be smooth and slightly thick. This marinade is what gives bulgogi its signature flavor.
I add the sliced beef to the marinade and mix until everything is well coated. Then I cover it and let it rest in the refrigerator for at least two hours. When I have time, I leave it overnight for deeper flavor.
I heat a grill pan over medium-high heat with one tablespoon of oil. The beef is cooked in batches so it sears instead of steaming. Each batch takes about 2–3 minutes per side until lightly charred and cooked through.
Once all the beef is cooked, I return it to the pan briefly to warm everything together. I finish with sliced green onions and sesame seeds for freshness and crunch.