01 -
Preheat your oven to 375°F. Cut the 2 lbs boneless, skinless chicken breasts into 1-inch pieces. Season the chicken generously with salt and pepper to taste. This foundational step ensures your High Protein Chicken Parmesan Casserole - Family Dinner starts perfectly.
02 -
Heat 2 tbsp olive oil in a large oven-safe skillet or Dutch oven over medium heat. Add the 1/2 medium yellow onion, diced, and cook for 3-4 minutes until softened. Stir in the 3 cloves garlic, minced, and cook for another minute until fragrant.
03 -
Add the seasoned chicken pieces to the skillet with the aromatics. Cook for 5-7 minutes, stirring occasionally, until the chicken is lightly browned on all sides and mostly cooked through. This quick sear adds depth of flavor to your casserole.
04 -
Pour in the 24 oz jar marinara sauce. Stir in 1 tbsp Italian seasoning and 1/4 tsp red pepper flakes (if using). Bring the mixture to a gentle simmer, then reduce the heat to low and let it cook for 5 minutes, allowing the flavors to meld beautifully.
05 -
Remove the skillet from the heat. Stir 1/2 cup grated Parmesan cheese directly into the chicken and sauce mixture. Evenly sprinkle 1 cup Panko breadcrumbs over the top, then finish by covering with 2 cups (8 oz) shredded part-skim mozzarella cheese.
06 -
Transfer the skillet to your preheated oven. Bake for 20-25 minutes, or until the cheese is melted, bubbly, and golden brown. This final bake creates the irresistible cheesy crust for your High Protein Chicken Parmesan Casserole - Family Dinner.
07 -
Carefully remove the casserole from the oven. Let it rest for 5-10 minutes before serving to allow the sauce to set and prevent it from being too runny. Garnish with 2 tbsp fresh parsley, chopped, for a fresh finish.