01 - Cook chow mein noodles according to package directions. Drain thoroughly and rinse under cold running water to stop cooking process 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 develops golden crust. Flip carefully and crisp opposite side for 2-3 minutes. Transfer to plate and reserve.
03 - Whisk together soy sauce, oyster sauce, hoisin sauce, sesame oil, sugar, minced garlic, grated ginger, water, and cornstarch in small bowl until cornstarch dissolves completely.
04 - Wipe skillet clean. Heat remaining 1 tablespoon oil over high heat. Add onions and carrots; stir-fry 2 minutes. Add bell pepper, mushrooms, and snow peas; continue stir-frying 3-4 minutes until vegetables are tender-crisp and vibrant.
05 - Pour sauce mixture over vegetables. Stir constantly until sauce thickens and coats vegetables evenly, approximately 1 minute.
06 - Add bean sprouts and half the spring onions to skillet. Toss quickly to combine and heat through, about 30 seconds.
07 - Arrange crispy noodles on serving platter. Top with stir-fried vegetables and thickened sauce. Garnish with remaining spring onions, toasted sesame seeds, and fresh coriander. Serve immediately while noodles remain crispy.