In medium saucepan, cook pasta according to package instructions. Drain and add to large serving bowl.
In large skillet, saute diced chicken in olive oil and salt and pepper for 6-8 minutes, stirring often. Once chicken has cooked through, transfer to plate.
Chop all veggies. Add chopped veggies to same skillet that cooked the chicken in.
Add all the veggies (except the tomatoes) to the same skillet that you sauteed the chicken and steam/saute for 3-4 minutes with 1/4 cup of water. Add the tomatoes during the last minute. Transfer to plate.
Make white sauce in the same skillet. See video for details! (Note: My videographer husband was still at work while I made this dinner, so sorry about the few spots that are jumpy!)
In large serving bowl, toss pasta, cooked chicken, sauteed veggies with Parmesan sauce. Season with salt and pepper to taste…and extra Parmesan cheese if you like.
Serve Chicken Pasta Primavera.