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Keto Chicken Fajita Casserole Recipe

This Keto Chicken Fajita Casserole Recipe is a flavorful, low-carb dinner that the whole family will love. Packed with tender chicken, colorful bell peppers, and melted cheese, it’s a satisfying meal that fits perfectly into your keto lifestyle.
Prep Time15 minutes
Cook Time30 minutes
Total Time45 minutes
Course: Dinner
Cuisine: American
Servings: 4 servings
Calories: 420kcal

Ingredients

  • 1.5 lbs boneless, skinless chicken breasts, sliced into thin strips
  • 2 tbsp olive oil
  • 1 medium red bell pepper, sliced
  • 1 medium green bell pepper, sliced
  • 1 medium yellow bell pepper, sliced
  • 1 small yellow onion, sliced
  • 2 cloves garlic, minced
  • 1 tsp ground cumin
  • 1 tsp chili powder
  • 1/2 tsp paprika
  • 1/2 tsp salt
  • 1/4 tsp black pepper
  • 1 can (14.5 oz) diced tomatoes, drained
  • 1.5 cups shredded cheddar cheese
  • 1/2 cup sour cream
  • 1/4 cup chopped fresh cilantro
  • 1 medium avocado, sliced (for garnish)

Instructions

  • Prep the Chicken and Vegetables: Preheat your oven to 375°F (190°C). In a large skillet, heat 1 tablespoon of olive oil over medium-high heat. Add the sliced chicken breasts and cook for 5-6 minutes until no longer pink. Remove the chicken from the skillet and set aside.
  • Sauté the Vegetables: In the same skillet, add the remaining 1 tablespoon of olive oil. Add the sliced bell peppers and onion. Cook for 4-5 minutes until the vegetables are softened. Add the minced garlic, cumin, chili powder, paprika, salt, and black pepper. Stir well and cook for an additional 1 minute.
  • Combine Ingredients: In a large bowl, combine the cooked chicken, sautéed vegetables, drained diced tomatoes, 1 cup of shredded cheddar cheese, and sour cream. Mix well until everything is evenly coated.
  • Assemble the Casserole: Transfer the mixture to a 9x13-inch baking dish. Spread it out evenly and top with the remaining 1/2 cup of shredded cheddar cheese.
  • Bake: Place the baking dish in the preheated oven and bake for 20-25 minutes, or until the cheese is melted and bubbly, and the casserole is heated through.
  • Garnish and Serve: Remove the casserole from the oven and let it rest for 5 minutes. Garnish with chopped cilantro and sliced avocado before serving.

Notes

Pro Tips: Use pre-cut bell peppers to save time. For extra flavor, add a dash of smoked paprika or cumin. Make sure to drain the diced tomatoes well to avoid a watery casserole. Let the casserole rest for 5 minutes after baking for easier serving.Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat in the microwave or oven until warmed through. Freeze for up to 3 months.Variations: Swap chicken for ground turkey or beef for a different twist. Add sliced jalapeños for a spicy kick. Use dairy-free cheese to make this recipe lactose-free.