Cook the noodles according to package directions, drain, and toss with 1 tablespoon of vegetable oil to prevent sticking. Set aside.
Heat a large wok or skillet over high heat until smoking hot. Add 1 tablespoon of vegetable oil and swirl to coat.
Add the cabbage, bell pepper, carrots, and snap peas. Stir-fry for 3-4 minutes until vegetables are tender-crisp and slightly charred. Remove vegetables to a plate.
Add the remaining 1 tablespoon of oil to the wok. Add garlic and ginger and stir-fry for 30 seconds until fragrant.
Add the cooked noodles to the wok and stir-fry for 2 minutes, allowing them to get slightly crispy in spots.
Return the vegetables to the wok and add soy sauce, oyster sauce, and sesame oil. Toss everything together for 1-2 minutes until well combined and heated through.
Garnish with sliced green onions and serve immediately while hot.