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Make this quick dinner recipe, Healthy Chicken Casserole for a delicious recipe using a rotisserie chicken to enjoy a homecooked meal with a handful of healthy ingredients.
Healthy chicken casserole recipes can sometimes be deceiving, but not this delicious casserole dish recipe.
There are only a few extra ingredients and no added homemade sauce to keep this recipe extra simple and healthy. However, you could always try some of my other scrumptious casseroles if you enjoy a creamy sauce.
Using a cooked chicken means you will have minimal prep to create this chicken dinner recipe lessening the prep time you might have needed, making this a great recipe for busy weeknights.

Ingredients for Healthy Chicken Casserole:
- Oil: you can use olive oil or avocado oil
- Vegetables: you will need a frozen bag of spinach, diced yellow onion, and sliced fresh mushrooms
- Protein: to keep things easy you can use a rotisserie chicken and shred the cooked chicken
- Seasoning: Add onion powder, garlic powder, paprika, and oregano to this healthy meal
- Cheese: use shredded mozzarella cheese for a delicious topping
How to make Healthy Chicken Casserole:
To a large pan or large skillet on the stove over medium heat add the oil once hot add the frozen spinach, onion, and mushrooms stir well, and let cook for 10 minutes stirring occasionally until the veggies are tender. Stir in all of the seasonings.

Spray a 8×8 baking dish with non stick spray.
Add the vegetable mixture to the bottom of the baking dish.

Top it with the chicken then the mozzarella cheese on top of the casserole.

Bake on 350 degrees for 30 minutes.
How to store leftover chicken casserole:
Fridge: Leave the leftover chicken casserole in the baking dish or remove it to place it in an airtight container and store it in the refrigerator for up to 5 days.
Freeze: A make-ahead tip, if you want to make this up to freeze, store it in a freezer-safe container and store it for up to 3 months in the freezer. Pull it out 24 hours before you need it to let it thaw in the fridge.

Tips and tricks for making this healthy casserole recipe:
Chicken to use:
Make this recipe using either a cooked rotisserie chicken from the grocery store, a package of pre-cooked chicken, or baking boneless skinless chicken breasts ahead of time to shred the juicy chicken before you prepare this easy chicken dinner recipe.
You could also cook chicken thighs or chicken tenders for this recipe as well. Making Instant Pot chicken breast is a great way to cook chicken fast as well.
Can I use raw chicken in this casserole?
Unfortunately no, you will need to already have juicy chicken ready to mix into the veggies of this dish.

Can I add more to this recipe?
Of course! Fresh broccoli florets, red pepper, black beans, and cauliflower would all be great options to add to this simple casserole.
What to serve with healthy casserole recipes:
- Wild rice
- Cauliflower rice
- White rice
- Brown rice
More casserole recipes:

Healthy Chicken Casserole
Equipment
- 8×8 baking dish
Ingredients
- 1 tbsp olive oil
- 12 oz frozen bag spinach
- 1 yellow onion diced
- 8 oz fresh mushrooms sliced
- 3 cups cooked shredded chicken I used part of a rotisserie chicken
- 1/2 tsp onion powder
- 1/2 tsp garlic powder
- 1/2 tsp paprika
- 1/2 tsp oregano
- 1 cup mozzarella cheese shredded
Instructions
- Pre-heat oven to 350 °F.
- To a large pan on the stove over medium heat add the oil once hot add the frozen spinach, onion, and mushrooms stir well and let cook for 10 minutes stirring occasionally until the veggies are tender. Stir in all of the seasonings.
- Spray a 8×8 baking dish with non stick spray.
- Add the vegetable mixture to the bottom of the baking dish.
- Top it with the chicken then the mozzarella cheese.
- Bake for 30 minutes.
Nutrition

Quick links for making dinner easy:
- Family meal plans
- Tools for the kitchen and more
- The best cookbook for family dinner recipes
- FREE budget meal plan
- Cooking videos to watch
If you give these recipes a try, make sure to tag us on Instagram @julia.pacheco.cooking and let us know how much you liked the recipes!