Combine the beef marinate ingredients – soy sauce, sesame oil, garlic, scallions, and pepper together. Add the slice beef, cover, and set aside for a minimum of 30 minutes or overnight if time permits.

Cook the rice according to package directions. Keep warm.

Fill a large pot with water and bring to a boil. One by one, blanch the zucchini, carrots, radish, mushrooms, and spinach for 1 minute and the bean sprouts for 2-3 minutes. Use a slotted spoon to remove them from the water and drain completely (squeeze the moisture out of the spinach only). Season each vegetable with ½ tsp. sesame seed oil and soy sauce, keeping the vegetables always separate.

Return the skillet to medium-high heat, add the marinated beef and the marinade, and stir-fry until the sauce has reduced and the meat is cooked through, about 3 minutes, and transfer to a plate.

Wipe out the skillet or use a clean pan and fry the eggs to your liking.

Serve ingredients in dishes like a buffet and let everyone make their own. To make bowls, add rice, arrange veggies and meat around and then top with the egg. Garnish with a drizzle of sesame oil and sesame seeds. Serve with gochujang or sriracha and kimchi if desired.