Bring a pot of water to boil and blanch the bean sprouts for 2-3 minutes until tender. Drain and set aside.
Blanch the spinach in boiling water for 1-2 minutes, then drain and squeeze out excess water. Season with a bit of salt and sesame oil. Set aside.
Heat a small amount of vegetable oil in a skillet over medium heat. Sauté the carrot, zucchini, and mushrooms separately until tender, seasoning each with a pinch of salt. Set each vegetable aside in separate bowls.
In the same skillet, add the thinly sliced beef and cook until browned. Add soy sauce, minced garlic, and a pinch of black pepper. Cook until the beef is fully cooked. Set aside.
In a small bowl, mix together the gochujang, sesame oil, sugar, water, vinegar, and minced garlic until well combined.
In a small skillet, heat a bit of vegetable oil and fry the egg sunny-side up. The yolk should still be runny.
Divide the cooked rice between serving bowls.
Arrange the prepared vegetables (bean sprouts, spinach, carrot, zucchini, mushrooms), beef, and cucumber slices on top of the rice in sections.
Place the fried egg in the center of each bowl.
Drizzle sesame oil over the top and sprinkle with sesame seeds.
Enjoy your meal!