Remove seasoning packets from noodle packages; reserve 1 packet (discard remaining seasoning packets). Cook noodles according to package directions, omitting the seasoning packets (do not drain); keep warm.
Combine chicken and reserved seasoning packet in a medium bowl.
Heat oil in a large nonstick skillet over medium-high heat.
Add chicken mixture; saut 5 minutes or until done.
Add broccoli and bell pepper; saut 2 minutes or until tender. Stir in soy sauce.