On a sheet pan, toss together all of the veggies, chicken, salt, pepper, onion powder, garlic powder, and Italian seasoning. Bake at 350 for 30 minutes, or until cooked through.
In a large skillet melt the butter over medium heat. Add garlic.
Add the cream cheese. Melt and whisk, but note that my cream cheese didn't melt in well.
Once it is sort of whisked in, add heavy cream.
Once that is combined well, add the shredded parmesan.
Whisk well. Taste and see if it needs and salt or pepper.
If you are wanting to make the alfredo sauce a little thinner, add broth until as thin as you desire.
Add cooked veggies and chicken to the alfredo sauce.
Mix well. Serve as is or over desired pasta.