Preheat your oven to 400ºF (200ºC).
In a bowl, beat together the spinach, cream cheese, and heavy cream. Add half the garlic, salt, onion powder, chili powder, black pepper, and Italian seasoning and beat to combine. Add parmesan cheese and ½ of the mozzarella cheese and continue beating to combine.
Lay the chicken breasts flat in the bottom of a large baking dish. Season the chicken breasts with salt, pepper and the remaining half of the garlic. Spread the spinach and cream cheese mixture on top of the chicken, top with sun-dried tomatoes then drizzle a tablespoon of oil reserved from the sun-dried tomatoes. Finish by topping the chicken casserole with mozzarella cheese.
Bake the Tuscan chicken casserole for 35 minutes: Cook for 20 minutes loosely covered with foil then uncover and bake 15 minutes or until the chicken is cooked through (165˚F – 71ºC internal temperature). Serve the Baked Tuscan chicken casserole immediately with your choice of sides (cauliflower rice, zucchini noodles…) – Enjoy!
