Cook pasta according to directions on package
Meanwhile, in a large skillet heat olive oil over medium heat. Add chicken to pan and cook for approximately 5 to 8 minutes, stirring occasionally. You want to cook the chicken until juices run clear and chicken is no longer pink. Sprinkle salt and pepper on the chicken and mix well.
Add onions, carrots, and zucchini to pan. Cook for 5-7 minutes until onions are translucent other vegetables are cooked through.
Once pasta is cooked, drain and combine pasta with the chicken vegetable mixture. Stir in marinara sauce until warmed.
Serve topped with grated Parmesan cheese