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Chicken Fajita Casserole

Chicken Fajita Casserole

This chicken fajita casserole combines tender chicken, colorful bell peppers, onions, bold fajita spices, and melted cheese in one easy, healthy, one-pan dinner. Perfect for busy weeknights, meal prep, and family-friendly meals.
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Prep Time 10 minutes
Cook Time 32 minutes
Total Time 42 minutes
Servings: 6 servings
Course: Dinner
Cuisine: Mexican, Tex-Mex
Calories: 320
Ingredients Equipment Method Notes

Ingredients
  

  • 1.5 lb boneless skinless chicken breasts, sliced
  • 3 whole bell peppers, sliced (red, yellow, orange)
  • 1 large onion, sliced
  • 2 tbsp olive oil
  • 2 tbsp fajita seasoning
  • 1 tbsp lime juice
  • 1 cup shredded cheddar or Mexican-blend cheese
  • fresh cilantro, optional garnish

Equipment

  • 9x13-inch baking dish
  • large mixing bowl
  • knife and cutting board

Method
 

  1. Preheat oven to 400°F and lightly grease a 9x13-inch baking dish.
  2. Add chicken, bell peppers, and onion to a large bowl. Drizzle with olive oil, sprinkle with fajita seasoning, and add lime juice. Toss until evenly coated.
  3. Spread mixture evenly in the prepared baking dish.
  4. Bake uncovered for 25 minutes, stirring once halfway through.
  5. Sprinkle cheese evenly over the top and return to oven for 5–7 minutes, until melted and bubbly.
  6. Let rest for 5 minutes before serving. Garnish with fresh cilantro if desired.

Notes

For a lower-carb option, serve with cauliflower rice or enjoy on its own. Adjust spice level by adding jalapeños or cayenne pepper. Leftovers taste even better the next day.