01 -
Preheat oven to 375°F and lightly grease a 9x13-inch baking dish.
02 -
Season chicken breasts with salt, pepper, paprika, and onion powder. Sear in olive oil over medium-high heat for 2-3 minutes per side until lightly browned.
03 -
In a medium bowl, whisk together softened cream cheese, sour cream, minced garlic, and a pinch of salt until smooth and well combined.
04 -
Layer fresh spinach evenly in the bottom of the prepared baking dish. Place seared chicken breasts over the spinach, then spread the cream cheese mixture evenly on top.
05 -
Sprinkle shredded mozzarella cheese over the assembled casserole. Bake in the preheated oven for 25-30 minutes until the chicken is fully cooked and the cheese is bubbly and golden.