Large nonstick skillet or wok Ideally 12 inches or larger to accommodate all the ingredients without overcrowding. A cast iron skillet can also work.
Mixing bowls For tossing the sauce and prepping your beef.
Tongs or a wooden spoon To stir-fry and toss the noodles evenly.
Colander or sieve To drain and rinse your glass noodles after boiling.
Alternatives If you don’t have a wok, any wide, deep frying pan will do. And if you’re missing a colander, a slotted spoon can help remove the noodles from the boiling water.
Ingredients
For the Sauce
3tablespoonssoy sauceregular or low-sodium
1tablespoonsesame oil
1tablespoonbrown sugar
1teaspoonrice vinegar
1teaspoonminced garlic
1/2teaspoonfreshly ground black pepper
For the Japchae
6ozabout half a package Korean glass noodles (dangmyeon)
1tablespoonneutral oillike canola or vegetable oil
1/2lbbeef sirloin or ribeyethinly sliced against the grain
1medium carrotjulienned
1small red bell pepperthinly sliced
1small yellow onionthinly sliced
2scallionssliced into 2-inch pieces
2cupsbaby spinach
4–5 shiitake mushroomsrehydrated if dried, sliced thin
1tablespoonsesame seeds
Saltto taste
Instructions
Soak and Boil the Noodles
Start by soaking your Korean glass noodles in warm water for about 10 minutes. While they soak, you can prep your vegetables and slice your beef. After soaking, boil the noodles for 6–7 minutes until soft and chewy. Drain and rinse them under cold water to stop the cooking process. Set them aside.
Make the Sauce
In a small bowl, combine soy sauce, sesame oil, brown sugar, rice vinegar, garlic, and black pepper. Whisk until the sugar dissolves and set aside.
Sear the Beef
Heat your skillet over medium-high heat and add the oil. Toss in the sliced beef and sear until browned but not overcooked — about 2–3 minutes. Remove the beef and set it aside.
Cook the Vegetables
In the same pan, sauté the onions, carrots, and bell peppers for 2–3 minutes until just starting to soften. Add the mushrooms and cook for another minute. Then toss in the spinach and scallions, stirring just until wilted.
Combine Everything in the Pan
Add the cooked noodles and beef back into the pan. Pour the sauce over everything. Use tongs or a wooden spoon to toss and combine thoroughly, letting the sauce coat every strand of noodle and bit of vegetable. Cook for 2–3 more minutes, allowing everything to warm through and slightly caramelize.
Finish and Serve
Sprinkle with sesame seeds and give the japchae a final toss. Serve warm as a main dish or as one of several Korean side dishes. Leftovers reheat beautifully for lunch the next day.