01 -
In a bowl, whisk together 1 tbsp minced garlic, sesame oil, soy sauce, oyster sauce, rice vinegar, and cornstarch slurry. Coat the thinly sliced beef and let it rest for 10 minutes to tenderize and absorb flavors.
02 -
Boil udon noodles in a large pot of water for 1-2 minutes until loosened but still chewy. Drain and set aside to prevent overcooking.
03 -
Combine dark soy sauce, oyster sauce, freshly ground black pepper, water, and potato starch in a small bowl. Stir well to integrate.
04 -
Heat oil in a wok over medium heat. Sauté minced garlic and sliced onions until softened. Add marinated beef and cook for 2-3 minutes until browned.
05 -
Pour the black pepper sauce mixture into the wok. Stir continuously over low heat until the sauce thickens and gains a glossy appearance.
06 -
Add cooked udon noodles and chopped Chinese cabbage to the sauce. Toss thoroughly to coat all ingredients evenly. Season with salt and sugar to taste, then serve immediately.