Arrange chicken pieces in a 9x13" freezer safe baking dish. Drizzle chicken with olive oil.
Sprinkle with seasoning salt, garlic powder, and pepper. Place sprigs of rosemary around the chicken. Sprinkle fresh grated lemon zest over chicken. Arrange citrus slices on top of the chicken and rosemary.
Thaw completely. Preheat oven to 400. Roast chicken for 30-40 minutes or until chicken is fully cooked (internal temperature = 165F). Let rest before serving.