1. Marinate the chicken: Combine chicken, teriyaki marinade, garlic, ginger, gochujang, and black pepper.
2. Cook the chicken: Heat 2 tbsp olive oil in a hot wok or large pan. Add marinated chicken and cook until browned and cooked through, about 6-8 minutes. Remove and set aside.
3. Cook the veggies: Add peas, carrots, and diced onion to the wok. Sauté until onions are soft.
4. Scramble the eggs: Push veggies to one side and add eggs. Scramble until cooked through.
5. Add rice and seasoning: Make a well in the center, add 2 tbsp butter, then stir in rice, soy sauce (adjust to taste, 2-3 tbsp), black pepper, chicken bouillon, and sesame oil. Mix everything together.
6. Finish and serve: Add the cooked chicken back in, toss everything until heated through, and serve hot.