Preheat oven to 475°.
Combine chicken and seasoning in a medium bowl, tossing to coat. Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add chicken; cook for 4 minutes or until browned, stirring occasionally. Arrange chicken in an 8-inch square baking dish coated with cooking spray; top with salsa, cheese, and chiles. Bake at 475° for 8 minutes or until chicken is done and cheese is melted. Top each serving with 1 tablespoon sour cream and 1 1/2 teaspoons olives.