Cook noodles according to package; drain and toss with 1 tablespoon oil to prevent sticking. Set aside.
Heat large wok or skillet over high until smoking hot; add 1 tablespoon oil and swirl to coat.
Stir-fry cabbage, pepper, carrots, and peas 3-4 minutes until tender-crisp and slightly charred; remove to plate.
Add remaining 1 tablespoon oil; stir-fry garlic and ginger 30 seconds until fragrant.
Stir-fry noodles 2 minutes, letting them crisp slightly in spots.
Return vegetables; add soy sauce, oyster sauce, and sesame oil. Toss 1-2 minutes until combined and heated through.
Garnish with green onions; serve immediately, hot.