Place the chicken breasts in a plastic bag or cover them with plastic wrap. Use a rolling pin or meat mallet to pound the chicken to an even thickness.
Arrange the chicken in the baking dish.
Lightly spray a 9x13-inch baking dish with oil. Place the prepared chicken breasts in the dish in a single layer.
Season the chicken.
Season the chicken evenly with paprika, Italian seasoning, garlic seasoning, crushed red pepper, sea salt, and black pepper.
Add the vegetables.
Arrange the sliced mushrooms and chopped sun-dried tomatoes around the chicken in the baking dish.
Prepare the cornstarch mixture.
In a small bowl, whisk the chicken broth and cornstarch together until the cornstarch is fully dissolved.
Prepare the cream sauce.
Add the heavy cream, softened cream cheese, minced garlic, salt, and black pepper to the broth mixture. Whisk until smooth and fully combined.
Add the Parmesan.
Stir the grated Parmesan cheese into the cream sauce until evenly incorporated.
Pour the sauce over the chicken.
Pour the cream sauce evenly over the chicken, mushrooms, and sun-dried tomatoes.
Bake the chicken.
Bake for 17 to 20 minutes, or until the chicken reaches an internal temperature of approximately 162°F to 163°F.
Add the spinach.
Remove the baking dish from the oven. Add the chopped spinach to the hot cream sauce and allow it to wilt while the chicken rests.
Rest the chicken.
Allow the chicken to rest until it reaches a safe internal temperature of 165°F.
Serve.
Serve warm over pasta, rice, mashed potatoes, cauliflower mash, or with preferred side dishes.
Notes
To make this recipe gluten-free, confirm that the chicken broth, cream cheese, Parmesan cheese, cornstarch, and seasonings are certified gluten-free.Use plain, unseasoned chicken breasts and avoid any pre-marinated chicken that may contain gluten-based additives.Check the sun-dried tomatoes carefully, especially if they are packaged in oil or seasoning blends, as some brands may include gluten-containing ingredients or shared-facility warnings.Cornstarch is naturally gluten-free, but it is best to use a certified gluten-free brand if preparing this dish for someone with celiac disease or gluten sensitivity.Serve the Creamy Baked Tuscan Chicken with gluten-free pasta, rice, mashed potatoes, cauliflower mash, roasted vegetables, or a gluten-free bread option.Use clean cookware, utensils, cutting boards, and measuring tools to prevent cross-contamination.