Prep - while pasta is cooking, cut all vegetables.
In a large skillet, heat up oil and butter over medium heat.
Add broccoli and carrots and saute for 1 minute.
Add bell peppers and squash sautéing for additional minute.
Add onions, tomatoes, sautéing for additional minute.
Add garlic, Italian seasoning, salt & pepper. Mix well.
Remove vegetables from skillet. Add 1 TBS butter to skillet on medium heat. Add parmesan cheese, chicken broth, milk, salt & pepper, and cooked chicken, stir well.
Add vegetables and cooked pasta back to skillet with sauce and stir to combine. Garnish with fresh parsley and more parmesan cheese.