Add the sliced beef and marinate in a bowl. Add soy sauce, sesame oil, brown sugar or honey, minced garlic, grated ginger, and ground black pepper and marinate for at least 15-30 minutes
Add a bit of oil to a hot pan. Add carrots, zucchini, shiitake mushrooms and sauté for about 3-4 minutes.
For the spinach and bean sprouts, blanch them briefly in boiling water, then drain and squeeze out excess water.
In a small bowl, combine gochujang, soy sauce, sesame oil, honey or sugar, rice vinegar, and minced garlic. Mix until smooth and well combined.
In the same skillet, add the marinated beef and stir occasionally until the beef is cooked through and slightly caramelised, about 4-5 minutes. Remove from heat and set aside.
In the same skillet, cook the eggs sunny-side-up. Add salt and a sprinkle of sesame seeds.
In each serving bowl, place a portion of cooked rice. Arrange the cooked vegetables and beef on top of the rice, grouping them in sections or arranging them in a visually appealing manner. Place a sunny-side-up egg on top.
Drizzle some gochujang sauce over the top or serve it on the side. Garnish with sesame seeds and fresh coriander or green onions.