Cook the noodles according to the directions on the package and set aside.
Heat oil and cook the onions for 5 minutes.
Add green onion and mushroom and cook for an additional 4 minutes.
Add noodles, vegetarian oyster sauce, sesame oil, dark soy sauce, regular soy sauce, garlic powder and white pepper powder.
Stir to combine and stir fry noodles for 3-5 minutes. Stir fry longer for crispier noodles.

2 tablespoon grapeseed oil or another high heat oil
1 small red onion, sliced into half moons
1/2 cup green onion, chopped
2 cup oyster mushroom, cut in half long ways
1 package white mushroom
1 (14-ounce) package dried chow mein noodles, without egg
1 tablespoon vegetarian oyster sauce
1/2 teaspoon sesame oil
1 tablespoon dark soy sauce
2 tablespoon regular soy sauce
2 teaspoon garlic powder
1/8 teaspoon white pepper powder