Julienne carrots. Slice zucchini and mushrooms.
In a bowl, combine soy sauce, sesame oil, mirin, and honey. Toss the beef in the marinade and let it sit for 15–20 minutes.
In another bowl, mix together gochujang, soy sauce, rice vinegar, honey, water, and minced garlic. Set aside.
Rinse 2 cups of rice and add it to a rice cooker. Layer the marinated beef on top, then add the carrots, mushrooms, and zucchini. Cook on the normal rice setting.
While the rice is cooking, fry an egg and set it aside.
In the last 5–7 minutes of cooking, add the spinach so it stays fresh and vibrant.
Once the rice and beef are done, top with the fried egg. Drizzle with gochujang sauce and mix everything together before serving.