Prepare pasta according to package instructions.
Meanwhile, heat olive oil in large frying pan over medium medium heat for 1 to 2 minutes. Add chicken. Cook for 2 minutes or until no longer pink. Remove chicken and put on plate.
In the same frying pan, cook onion and garlic for 2 to 3 minutes until onions no longer translucent. Add tomato sauce, diced tomatoes, tomato paste, salt, pepper, and Italian seasoning. Bring to boil and add bell pepper and zucchini.
Cover and reduce heat until sauce is simmering. Cook for 5 to 8 minutes only until vegetables tender. Remove from heat.
Serve over cooked pasta and enjoy!