Spinach chicken casserole is a comforting and nutritious dish that combines protein-rich chicken with the health benefits of fresh spinach. Spinach is a superfood packed with vitamins A, C, and K, iron, and antioxidants, which support immune function and heart health. Incorporating cream cheese and mozzarella not only creates a creamy texture but provides calcium and protein, making this casserole both tasty and satisfying. The addition of garlic powder and onion powder enhances the flavor without adding extra calories or salt, while red pepper flakes can be included optionally for those who enjoy a slight spicy kick. Using chicken broth helps keep the casserole moist and adds depth to the flavor profile. For a crunchy topping, mixing breadcrumbs with olive oil before sprinkling them over the casserole creates a golden crust that contrasts beautifully with the creamy filling. Baking at 375°F (190°C) for 25-30 minutes ensures that the casserole is heated through and bubbly. This recipe is versatile and can be adapted with other vegetables like mushrooms or bell peppers for added nutrition and variety. For a low-carb option, consider using almond flour mixed with butter instead of breadcrumbs. Serving this casserole provides a balanced meal suitable for family dinners or meal prep. It yields six servings, each approximately 350 kcal, making it a moderate-calorie option for those mindful of their intake. To maximize the health benefits and flavor, use fresh spinach rather than frozen when possible, and choose quality chicken—whether rotisserie or home-cooked. This dish also reheats well, making it ideal for leftovers. In summary, this spinach chicken casserole with cream cheese and mozzarella is a delicious, nutrient-rich, easy-to-make meal that fits well into weeknight dinner plans or casual entertaining.