Cook the noodles according to the package instructions.
Add oil to a large non-stick skillet over medium heat.
Once hot, add chicken. Stir fry for a few minutes or until slightly brown.
Add bell pepper and carrots and stir fry for about 2 more minutes.
Add cooked noodles, brown sugar, rice vinegar and fish sauce.
Add garlic and green onions. Stir fry for about 1 more minute.
Push the mixture to the edge of the skillet.
Add beaten eggs. Cook and scramble until eggs have cooked through.
Add in bean sprouts, and stir fry for for 2-3 minutes. Mix everything thoroughly.
Remove from heat. Top with optional peanuts, cilantro, or green onions. Serve and enjoy!