Penne with Chicken and Zucchini

I made this for dinner last night and Derek said it was one of the best things he's ever eaten. While I highly doubt that, this was easy to prepare and is a delicious way to eat more vegetables. The pasta I used was actually from Wegman's and bigger than Penne, but I can't remember the name. It stood up well to the chicken, but any type of pasta that you have on hand would taste great.

Penne with Chicken and Zucchini

1 box of penne (or any pasta)
3 small zucchini
3 chicken breasts
1 medium onion
1 jar of tomato sauce (I used tomato & basil)

Add water to a large pot, and put it on high heat. Once the water boils, cook the pasta according to the directions on the package.
Season the chicken with some salt and pepper. In a frying pan, cook the chicken until it is no longer pink inside. While the chicken is cooking, chop the onion and zucchini into bite-sized pieces. Once the chicken is cooked, put it on the cutting board and put the onion and zucchini into the pan to soften. Chop the chicken into pieces similar in size to the onion and zucchini.
Use a strainer or the pot's lid to pour most of the water off of the pasta.
Add the chicken, onion, zucchini, and tomato sauce to the pot with the pasta and stir to coat the pasta with the sauce.