01 - Cook the chow mein noodles according to package instructions. Drain thoroughly and rinse with 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. Add cooked noodles in an even layer. Fry undisturbed for 4-5 minutes until bottom becomes crispy and golden brown. Flip carefully and crisp opposite side for 2-3 minutes. Transfer to plate and reserve.
03 - Whisk together soy sauce, vegetarian oyster sauce, hoisin sauce, sesame oil, sugar, minced garlic, grated ginger, water, and cornstarch in small bowl until cornstarch dissolves completely. Set aside.
04 - Wipe out 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 skillet. Stir-fry for additional 3-4 minutes until vegetables become tender-crisp and maintain vibrant color.
06 - Pour sauce mixture over vegetables. Stir constantly for about 1 minute until sauce thickens and coats vegetables evenly.
07 - Add bean sprouts and half the spring onions. Toss quickly to combine. Transfer crispy noodles to serving platter. Top with stir-fried vegetables and sauce. Garnish with remaining spring onions, sesame seeds, and fresh coriander. Serve immediately while noodles remain crispy.