01 - Cook noodles according to package directions. Drain and rinse with cold water to stop cooking. Set aside for later use.
02 - Whisk together soy sauce, oyster sauce, hoisin sauce, brown sugar, sesame oil, red pepper flakes, and water in a small bowl until sugar dissolves completely.
03 - Heat large skillet or wok over medium-high heat. Add ground beef and cook 5-6 minutes, breaking apart with spoon, until browned and fully cooked. Drain excess fat if needed.
04 - Stir in minced garlic and grated ginger. Sauté for 1 minute until fragrant, being careful not to burn the garlic.
05 - Add carrot, bell pepper, and cabbage to skillet. Stir-fry for 3-4 minutes until vegetables begin to soften but still retain some crunch.
06 - Pour prepared sauce over beef and vegetables. Stir well and simmer for 2 minutes to allow flavors to meld and sauce to slightly thicken.
07 - Add cooked noodles to skillet. Toss everything together until noodles are evenly coated with sauce and heated through, about 1-2 minutes.
08 - Remove from heat. Sprinkle with sesame seeds and fresh cilantro or additional green onions. Serve immediately while hot.