Shortcut Chicken Fajita Casserole

By smlchng70

4.33 / 5

15min

55min

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1 serving nonstick cooking spray
2 (1 ounce) packages fajita seasoning mix
3 pounds skinless, boneless chicken breast halves
1 (1 pound) package frozen bell pepper and onion mix
2 cups shredded mozzarella cheese