Cook the noodles according to package directions, drain and set aside (ideally they are cooled completely and even chilled in the refrigerator first so they are not soggy).
Add the olive oil to a large wok or skillet and add the mushrooms, broccoli, and carrots.
Sprinkle with salt and pepper and stir, cooking over medium heat for about 8 minutes.
Add the sesame oil, noodles and green onion and stir while cooking over medium heat for 4-5 minutes.
Add the soy sauce and walnuts, toss together and serve immediately.
