Chicken Fajita Casserole

Recipe posted in: Flex Meals & Snacks, Lunches & Dinners, Main Courses
Chicken Fajita Casserole

Imagine the sizzle of a hot skillet loaded with colorful bell peppers, onions and tender chicken, all wrapped in the bold flavors of Mexican spices. Now, picture enjoying that same mouthwatering experience in an easy-to-make, no-fuss casserole. That’s exactly what you get with this Chicken Fajita Casserole—a simple, nutritious and utterly satisfying meal that’s perfect for busy weeknights.

This recipe takes all the best parts of traditional fajitas and transforms them into a one-dish wonder that’s easy to prepare and even easier to clean up. No need for multiple pans, tortillas to assemble or extra toppings—just toss everything together and let the oven do the work.

A Healthier Take on Fajitas

Unlike classic fajitas that can sometimes be heavy on oils and fats, this casserole keeps things light without sacrificing flavor. But don’t let that fool you into thinking we’ve skimped on flavor. This dish is packed with a vibrant blend of spices, lean chicken and a rainbow of vegetables that will make your taste buds dance.

Each serving comes in at just 342 calories, making it a well-balanced meal that fits into a healthy eating plan. The combination of lean shredded chicken, fiber-rich black beans and whole wheat tortillas ensures that you’re getting plenty of protein and nutrients while staying full and satisfied.

On a Nutrisystem plan? This meal counts as one SmartCarb, two PowerFuels, one Extra and half of a Vegetable serving, making it a great choice for those following a weight loss program.

How to Make Chicken Fajita Casserole

This casserole is incredibly easy to prepare, requiring just a few simple steps:

  1. Sauté the Vegetables – Start by cooking sliced onions and bell peppers in a bit of olive oil until they’re soft and fragrant.
  2. Mix the Sauce – Combine no-salt-added tomato sauce, fire-roasted diced tomatoes and a blend of Mexican-inspired spices like paprika, cumin and black pepper.
  3. Combine the Ingredients – Add shredded chicken and black beans to the pan, mix everything together and cook briefly to meld the flavors.
  4. Layer and Bake – If you’re using a cast iron skillet, you can bake everything right in the same pan. Otherwise, transfer the mixture to a baking dish, top it with chopped whole wheat tortillas and shredded reduced-fat Mexican cheese, and bake until the cheese is perfectly melted and bubbly.

Ways to Customize This Recipe

The beauty of this Chicken Fajita Casserole goes beyond its health benefits and time-saving aspects. It’s also incredibly adaptable and you can easily tweak it to fit your preferences or dietary needs:

  • Swap the Protein – Not a fan of chicken? Try using lean ground beef, ground turkey, shrimp or even tofu for a vegetarian twist.
  • Add More Veggies – While bell peppers and onions are fajita staples, you can add mushrooms, zucchini or spinach for extra nutrients.
  • Spice it Up – Love heat? Toss in some diced jalapeños or a pinch of cayenne pepper for an extra kick.
  • Make it Low-Carb – Skip the tortillas and use extra veggies instead to keep the dish lower in carbohydrates while still being satisfying.

What to Serve with Chicken Fajita Casserole

When it comes to toppings and sides, the sky’s the limit! This dish is a complete meal on its own, but you can pair it with a few simple sides for even more flavor and variety:

  • Avocado or Guacamole – A creamy contrast to the bold fajita flavors.
  • A Side Salad – A fresh, crisp salad with a light lime vinaigrette complements this dish beautifully.
  • Cauliflower Rice – For a lower-carb option, serve it alongside cauliflower rice instead of traditional grains.
  • Greek Yogurt – Swap out sour cream for plain Greek yogurt to add a touch of creaminess with extra protein.

If you add any toppings, be sure to check out the Nutrisystem Grocery Guide to find out how to count them on your weight loss plan.

Perfect for Meal Prep and Leftovers

If you love batch cooking, this recipe is a great one to add to your meal prep rotation. It stores well in the fridge for up to four days, making it a convenient option for easy lunches or dinners throughout the week. Simply reheat in the microwave or oven until warmed through, and you’ve got a delicious meal ready in minutes.

Make This Your New Go-To Dinner

This Chicken Fajita Casserole delivers bold flavors, satisfying textures and a comforting feel—all with minimal effort. Whether you’re cooking for a busy family, meal prepping for the week, or simply looking for a healthier alternative to traditional fajitas, this dish is sure to become a favorite.

If you love this recipe, be sure to check out our Chicken Fajita Stuffed Peppers for another delicious twist on classic flavors!

Servings: 4

Calories per Serving: 342

On Nutrisystem, Count As: 1 SmartCarb, 2 PowerFuels, 1 Extra and ½ Vegetable

Ingredients:

  • 2 tsp. olive oil
  • ½ onion, sliced
  • 1 cup bell pepper strips (fresh or frozen and thawed)
  • ½ cup tomato sauce, no salt added
  • ½ cup fire roasted diced tomatoes
  • 1 tsp. paprika
  • 1 tsp. cumin
  • ½ tsp. black pepper
  • 2 cups cooked shredded chicken
  • 1 cup black beans
  • 2 whole wheat tortillas, cut into small pieces
  • 1 cup shredded Mexican cheese, reduced fat

Directions:

  1. Preheat oven to 375°F.
  2. Heat oil in a cast iron skillet or large pan set to medium heat. Add onions and peppers. Cook until soft.
  3. In a separate bowl, mix tomato sauce, diced tomatoes, paprika, cumin, and black pepper.
  4. Add chicken, beans and sauce to the pan. Stir to combine and cook for 4-5 minutes.
  5. If using a regular pan, transfer dish to a baking pan. Top mixture with tortilla pieces and then shredded cheese.
  6. Bake in the oven for 15 minutes.
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