Cheesy • Flavorful • High-Protein Comfort Meal
This Fajita Chicken Breasts Casserole combines juicy chicken breast, colorful bell peppers, onions, creamy fajita-seasoned sauce, and melted cheese into one delicious baked dish. It has all the classic fajita flavors in an easy casserole format that’s perfect for family dinners, meal prep, or a satisfying high-protein meal.
Tender chicken. Smoky fajita seasoning. Golden cheesy topping.
Recipe Overview
Servings: 6
Prep Time: 15 minutes
Cook Time: 35 minutes
Total Time: 50 minutes
Calories: ~390 kcal per serving
Diet Style
• High-protein
• Low-carb friendly
• Gluten-free
• Meal-prep friendly
• Family-friendly
Equipment
Baking dish
Large skillet
Knife
Cutting board
Mixing bowl
Measuring cups
Oven
Ingredients
Chicken & Vegetables
2 lbs (900g) chicken breasts, sliced into strips
2 tbsp olive oil
1 large red bell pepper, sliced
1 large green bell pepper, sliced
1 large onion, sliced
3 cloves garlic, minced
Fajita Seasoning
2 tsp chili powder
1 tsp smoked paprika
1 tsp cumin
1 tsp garlic powder
1 tsp onion powder
1 tsp salt
½ tsp black pepper
½ tsp oregano
¼ tsp cayenne pepper (optional)
Creamy Cheese Topping
½ cup Greek yogurt
½ cup cream cheese, softened
1 cup shredded mozzarella cheese
½ cup shredded cheddar cheese
2 tbsp lime juice
2 tbsp fresh cilantro, chopped
Step-by-Step Instructions
Step 1 — Season the Chicken
Slice chicken breasts into strips.
Add fajita seasoning:
- Chili powder
- Smoked paprika
- Cumin
- Garlic powder
- Onion powder
- Salt
- Pepper
- Oregano
Mix until chicken is fully coated.
Step 2 — Cook Chicken and Vegetables
Heat olive oil in a skillet.
Add seasoned chicken and cook until lightly browned.
Add:
- Bell peppers
- Onion
- Garlic
Cook for 5–6 minutes until vegetables soften slightly.
Step 3 — Prepare Creamy Sauce
In a bowl, mix:
- Greek yogurt
- Cream cheese
- Lime juice
Stir until smooth and creamy.
Step 4 — Assemble the Casserole
Place chicken and fajita vegetables into a baking dish.
Spread the creamy sauce evenly over the top.
Add:
- Mozzarella cheese
- Cheddar cheese
Step 5 — Bake
Bake at 375°F (190°C) for 25–30 minutes until the cheese is melted, bubbly, and golden.
Step 6 — Serve
Let the casserole rest for 5 minutes.
Garnish with fresh cilantro and extra lime juice.
Serve warm.
Nutrition (Approx.)
Calories: 390
Protein: 45g
Total Carbs: 10g
Net Carbs: 8g
Fiber: 2g
Fat: 20g
Nutrition may vary depending on cheese and portion size.
Ingredient Benefits
Chicken Breast 🍗
A lean protein source that helps support muscle maintenance and keeps you satisfied.
Bell Peppers 🌶️
Packed with vitamin C, antioxidants, and natural sweetness.
Greek Yogurt
Adds extra protein while creating a creamy texture.
Cheese 🧀
Provides calcium and a rich savory flavor.
Onions
Add depth, sweetness, and beneficial plant compounds.
Serving Ideas
Low-Carb Meal
Serve with:
- Cauliflower rice
- Side salad
- Roasted vegetables
Family Dinner
Pair with:
- Tortillas
- Mexican rice
- Black beans
Meal Prep
Divide into containers for easy high-protein lunches throughout the week.
Storage
Fridge: Store in an airtight container for up to 4 days
Freezer: Freeze portions for up to 2 months
Reheat: Warm in the oven or microwave until heated through.
Tips
Use chicken thighs for a juicier casserole.
Add jalapeños for extra heat.
Let cream cheese soften before mixing for a smoother sauce.
Use freshly grated cheese for the best melting texture.
Add mushrooms or zucchini for extra vegetables.
Final Thoughts
This Fajita Chicken Breasts Casserole is a perfect balance of comfort food and healthy eating. The combination of seasoned chicken, colorful peppers, creamy sauce, and melted cheese creates a meal that is satisfying, flavorful, and easy to prepare.
A high-protein casserole that makes weeknight dinners simple and delicious.
