Korean BBQ Beef Bibimbap with Fried Egg and Gochujang Sauce

**Prepare the Beef (if making from scratch):** Thinly slice the beef (ribeye or sirloin works best) against the grain. In a bowl, combine all the marinade ingredients. Add the beef slices and marinate for at least 30 minutes, or up to overnight in the refrigerator.

**Cook the Beef:** Heat a large skillet or grill pan over medium-high heat. Add the marinated beef and cook for 2-3 minutes per side, or until cooked through. Set aside and slice into bite-sized pieces.

**Prepare the Vegetables:** Blanch the spinach in boiling water for 30 seconds, then immediately transfer to an ice bath to stop the cooking process. Squeeze out excess water and season with a pinch of salt and a drizzle of sesame oil.

**Cook the Mushrooms:** Heat 1 tablespoon of vegetable oil in a skillet over medium heat. Add the sliced shiitake mushrooms and cook until softened and slightly browned, about 5-7 minutes. Season with a pinch of salt.

**Cook the Bean Sprouts:** Quickly blanch the bean sprouts in boiling water for 1 minute. Drain and season with a pinch of salt and a drizzle of sesame oil.

**Season the Carrots and Cucumbers:** In separate bowls, lightly toss the julienned carrots and cucumbers with a pinch of salt. This will help release some moisture and enhance their flavor.

**Fry the Eggs:** Heat the remaining tablespoon of vegetable oil in a non-stick skillet over medium heat. Fry the eggs to your desired doneness (sunny-side up is traditional).

**Prepare the Gochujang Sauce (optional):** In a small bowl, combine the gochujang, soy sauce, garlic, sugar, and a teaspoon of sesame oil. Adjust the amount of gochujang to your preferred spice level.

**Assemble the Bibimbap:** Divide the cooked rice among four bowls. Arrange the cooked beef, spinach, carrots, mushrooms, bean sprouts, and cucumbers attractively on top of the rice. Place a fried egg in the center of each bowl.

**Serve:** Drizzle each bowl with the prepared gochujang sauce (or serve it on the side). Sprinkle with sesame seeds. Encourage diners to mix everything together before eating.