01 -
Set the oven to 375°F (190°C) and prepare a 9x13-inch baking dish with cooking spray.
02 -
Combine sour cream, 1/2 cup grated Parmesan, corn starch, dried oregano, dried basil, garlic powder, salt, and pepper in a bowl until smooth.
03 -
Arrange chicken breasts evenly in the prepared baking dish and top each breast with a slice of mozzarella cheese.
04 -
Spread the sour cream mixture evenly over the chicken breasts, then sprinkle the remaining 1/4 cup grated Parmesan cheese on top.
05 -
Bake uncovered for 45 minutes to 1 hour, depending on breast thickness, until chicken is cooked through and cheese is golden.
06 -
Serve chicken over rice and garnish with chopped parsley.