Mix sauce ingredients together in a medium bowl and set aside.
Add half the oil to a large pan, and heat over medium. Once oil is shimmering, add the eggs and scramble until cooked through. Set aside on a plate.
Add the remaining oil to the pan, along with the chicken. Season with salt and pepper. Once cooked through (no longer pink), push cooked chicken to the side of your skillet. If no oil remains in the pan add an additional tablespoon, as well as your garlic and scallions. Stir constantly until the scallions begin to soften, about 1-2 minutes.
Add the sauce, eggs, and noodles. Toss so that everything is well coated. Continue to cook just until the noodles begin to soften (otherwise they'll get soggy!), about 2 minutes.
Garnish with cilantro, scallions, and peanuts. Enjoy!