Cook the Noodles: Begin by bringing a large pot of salted water to a boil. Once boiling, add the chow mein noodles and cook according to the package instructions, usually for about 4-5 minutes, or until tender yet firm to the bite. Once cooked, drain the noodles and rinse them under cold water to prevent sticking. Set aside.
Heat the Oil: In a large wok or a non-stick frying pan, pour in the sesame oil and place it over medium-high heat, allowing the oil to warm up until shimmering.
Sauté the Vegetables: Add the thinly sliced onion, shredded carrots, and bell pepper to the hot oil. Sauté these vegetables for about 3-4 minutes until they begin to soften and brighten in color. Next, incorporate the snap peas along with the minced garlic and grated ginger into the mix. Continue stir-frying for an additional 1-2 minutes until the garlic is aromatic and the veggies are cooked but still crisp.
Combine with Noodles: Gently toss the reserved chow mein noodles into the vegetable mixture in the wok, ensuring an even distribution.
Add Sauces: In a small bowl, whisk together the soy sauce, oyster sauce (or its vegetarian equivalent), hoisin sauce, sugar, and black pepper until well combined. Pour this sauce mixture over the noodles and vegetables in the wok. Using tongs or two wooden spatulas, gently toss everything together, making sure the noodles and vegetables are evenly coated in the flavorful sauce.
Finish Cooking: Stir-fry the chow mein mixture for an additional 2-3 minutes, allowing everything to heat through thoroughly and enabling the noodles to acquire a slight crispiness at the edges.
Serve and Garnish: Once fully cooked, remove the chow mein from the heat and transfer it to a serving platter. Top with sliced green onions and a generous sprinkle of sesame seeds for an appealing finish before serving.
Notes
For a vibrant presentation, consider serving the chow mein in individual bowls, garnished with additional sesame seeds and a sprig of fresh cilantro if desired.