Prepare the noodles as directed on the package(s). Drain and set aside.
In a large saute pan over medium high heat, add two tablespoons of oil Once hot, half of green onions. Saute for 3 minutes then add cooked noodles. Continue to saute for another 3 minutes.
Whisk together remaining oil, soy sauce, chili sauce, hoisin sauce, white pepper, rice vinegar and cornstarch. Add to saute pan and toss with noodles to evenly coat.
Add bean sprouts. Continue to saute for another 3 minutes as sauce thickens. Remove from heat and stir in remaining green onions.
Keyword bean sprouts, chinese fakeaway, chinese food, chow mein, green onions, sweet chili garlic sauce, sweet chili sauce, yakisoba noodles