1-First Step: Begin by preparing the marinades for this authentic Japchae recipe. In a medium bowl, combine the beef marinade ingredients: 1 tablespoon soy sauce, 1 teaspoon mirin (or white sugar), 1/2 teaspoon minced garlic, 1/4 teaspoon ground black pepper, and 1 teaspoon toasted sesame oil. Add the beef strips and toss to coat evenly. Set aside to marinate for 15-20 minutes.

2-Second Step: Prepare the Korean glass noodles according to package directions. Fill a large pot with water and bring to a boil. Add the 250g of sweet potato noodles and cook for 6-7 minutes until tender but still slightly firm to the bite (al dente). The moment those sweet potato noodles turn translucent and springy in the boiling water, you’ll know they’re perfectly cooked. Once cooked, immediately drain the noodles and rinse thoroughly under cold running water to stop the cooking process. This prevents the noodles from becoming mushy and helps maintain their pleasant chewy texture. Drain well and cut the noodles to 15-20 cm lengths if needed for easier eating. Add the cooked noodles to the large bowl with the noodle and vegetable dressing, but don’t mix them yet.

3-Third Step: Prepare all vegetables as instructed: julienne the carrots and red capsicum, thinly slice the yellow onion, and clean and slice the shiitake mushrooms. For the Alternative Method (Batch Cooking – Faster): Heat 2 tablespoons of cooking oil in a large pan or wok over high heat. Add the sliced mushrooms and optionally the white parts of 3 green onions (sliced) with 1/2 teaspoon salt. Cook for 2.5-3 minutes until starting to soften, then transfer to the noodle bowl. Heat 1 tablespoon more oil in the same pan. Add carrots and cook for 1.5 minutes, then add capsicum and cook for 1.5 minutes more. Finally, add spinach, the remaining 1/2 teaspoon salt, and the green onion tops; cook until spinach wilts, about 1.5 minutes. Transfer all cooked vegetables to the noodle bowl. For the Individual Cooking (Original) Method: Blanch spinach in boiling water for just 5-10 seconds, then drain, cool under cold water, and squeeze out excess water. Season with the spinach seasoning (1/4 teaspoon sea salt, 1/2 teaspoon minced garlic, and 1 teaspoon toasted sesame oil), then place in the large bowl. Heat oil and cook onion with a pinch of salt until soft, then transfer to the bowl. Cook carrots with salt until soft, transfer to bowl. Cook capsicum with salt until soft, transfer to bowl. Finally, cook mushrooms until softened and transfer to the bowl.

4-Fourth Step: Heat 1 tablespoon of oil in your pan over medium-high heat. Add the marinated beef and stir-fry until lightly browned and cooked through, approximately 1.5 minutes. Be careful not to overcook the beef, as it can become tough. Transfer the cooked beef to the large bowl with the noodles and vegetables. If using the optional egg garnish, heat a small amount of oil in the pan. Pour in the egg white and cook until set into a thin sheet. Remove, slice thinly into matchsticks, and repeat the process with the egg yolk. Add both egg white and yolk strips to the noodle bowl.

5-Final Step: Add most of the toasted sesame seeds (reserve a little for garnish) and the 1 tablespoon of finishing sesame oil to the large bowl. Gently toss all ingredients together using chopsticks or tongs until the noodles and vegetables are evenly coated in the deliciously savory-sweet dressing. Be careful not to break the noodles while tossing. Transfer the finished Japchae to a serving platter and sprinkle with the remaining sesame seeds for a beautiful presentation. Serve warm (but not piping hot) or at room temperature, as it’s traditionally enjoyed with Korean rice and other side dishes. This Korean special occasion food is now ready to be enjoyed! The authentic Japchae recipe typically serves 5-8 people, making it perfect for gatherings or as a make-ahead meal for the week.