COOK noodles as directed on package, omitting salt. Meanwhile, cook and stir chicken and garlic in dressing in wok or large skillet on high heat 5 min. or until chicken is done. Add egg; cook and stir 30 sec. or until egg is set.
ADD stir-fry sauce and peanut butter to chicken mixture; mix well.
DRAIN noodles. Add to wok; toss to coat. Stir in sprouts and onions. Sprinkle with nuts.