01 - Preheat the oven to 375°F.
02 - In a bowl, combine beef slices with soy sauce, brown sugar, grated pear (or apple), sesame oil, garlic, ginger, scallions, black pepper, and sesame seeds. Mix thoroughly and marinate for at least 15 minutes.
03 - Heat 1 tbsp vegetable oil in a skillet over medium-high. Add marinated beef and cook for 3–4 minutes until browned and cooked through. Set aside.
04 - In the same skillet, add the onion and carrot, sauté for 3 minutes until softened. Stir in chopped spinach and cook for 1 minute.
05 - Add cooked rice to the skillet, season with 1 tbsp soy sauce and 1 tsp sesame oil, and mix well. Remove from heat and let cool slightly.
06 - Combine the cooked bulgogi with the rice mixture. Fill each prepared bell pepper with the mixture, packing it gently.
07 - Arrange stuffed peppers upright in a baking dish. Cover loosely with foil and bake for 25 minutes. Remove foil and bake for an additional 10 minutes until peppers are tender.
08 - Garnish with sliced scallions and toasted sesame seeds before serving.