Heat oil in skillet on medium heat
Cut chicken into thin strips
Chop onion
Saute chicken in preheated skillet until lightly browned
Add frozen vegetables, tomatoes, onion, basil, onion powder, garlic powder, and lemon-pepper seasoning
Mix thoroughly
Bring to a boil
Reduce heat
Cover
Simmer for 8 minutes
While mixture is simmering, cook pasta according to package directions
Drain
Serve pasta and chicken mixture together