Bring a pot of water to a boil and cook the noodles according to package instructions until al dente. Drain and set aside.
In a small bowl, mix together soy sauce, oyster sauce, and sugar. Set this sauce aside.
In a large wok or skillet, heat the sesame oil and vegetable oil over medium-high heat. Add minced garlic and grated ginger, stir-frying for about 30 seconds until fragrant.
Add the sliced red and yellow bell peppers, julienned carrot, and snow peas to the wok. Stir-fry for about 3-4 minutes until the vegetables are slightly tender but still crisp.
Add the cooked noodles into the skillet and pour the prepared sauce over. Toss everything together, ensuring the noodles and vegetables are well coated.
Add bean sprouts and half of the chopped green onions, stir-frying for another minute to mix everything. Season with salt and pepper to taste.
Remove from heat and transfer to a serving platter. Garnish with the remaining green onions and a sprinkle of sesame seeds.