01 - Cook the chow mein noodles according to package instructions. Drain thoroughly and rinse under cold water to stop cooking and prevent sticking.
02 - Heat 1 tablespoon vegetable oil in a large nonstick skillet or wok over medium-high heat. Spread cooked noodles in an even layer. Fry undisturbed for 4-5 minutes until bottom becomes golden and crispy. Flip carefully and crisp the opposite side for 2-3 minutes. Transfer crispy noodles to a plate and set aside.
03 - In a small bowl, whisk together soy sauce, oyster sauce, hoisin sauce, sesame oil, sugar, minced garlic, grated ginger, water, and cornstarch until smooth and fully combined.
04 - Wipe out the skillet. Heat remaining 1 tablespoon oil over high heat. Add onions and carrots. Stir-fry for 2 minutes until onions begin to soften.
05 - Add bell pepper, mushrooms, and snow peas to the skillet. Stir-fry for 3-4 minutes until vegetables are tender-crisp and vibrant in color.
06 - Pour prepared sauce over vegetables. Stir continuously for about 1 minute until sauce thickens and coats all vegetables evenly.
07 - Add bean sprouts and half the spring onions. Toss gently to combine and heat through for 30 seconds.
08 - Arrange crispy noodles on a serving platter. Top with stir-fried vegetables and thickened sauce. Garnish with remaining spring onions, toasted sesame seeds, and fresh coriander if desired. Serve immediately while noodles remain crispy.