Alternatively, you can make the stuffing with water in a bowl before topping on the vegetables.
I have personally made this using my homemade croutons and they worked great! Since my croutons are larger than those that come prepackaged, I did chop mine up a bit.
You can use boneless chicken thighs in this instead of or in addition to the chicken breasts. For even more flavor, replace the water with chicken broth to wet the stuffing mix.