• Step 1: Bring a large pot of water to a boil. Cook the chow mein noodles according to package instructions, then drain and set aside.
• Step 2: In a large skillet or wok, heat the vegetable oil over high heat. Add the beef and sear for 2-3 minutes, until browned on the outside but still slightly pink in the center. Remove the beef from the pan and set aside.
• Step 3: In the same pan, sauté the garlic and ginger for 1 minute until fragrant. Add the onion, cabbage, and bell pepper. Stir-fry for 3-4 minutes, until the vegetables are tender-crisp.
• Step 4: Return the seared beef to the pan, along with the cooked noodles, soy sauce, rice vinegar, and sesame oil. Toss everything together until well combined and heated through, about 2-3 minutes.
• Step 5: Season with salt and pepper to taste. Serve hot, garnished with additional sliced green onions or sesame seeds, if desired.