Preheat your oven to 375°F (190°C). Cook the pasta according to package instructions until al dente. Drain and set aside.
Heat a skillet over medium heat and spray with olive oil. Season the chicken pieces with Cajun seasoning, garlic powder, and paprika. Cook the chicken for 5-6 minutes until fully cooked, then set aside.
In the same skillet, whisk together the light cream cheese and fat-free half-and-half until smooth. Season with salt, black pepper, and onion powder. Cook for 3-4 minutes until the sauce thickens slightly.
Add the cooked pasta and chicken to the skillet, tossing to coat everything evenly in the sauce.
Transfer the mixture to a 9x13-inch baking dish sprayed with olive oil. Top with shredded cheddar cheese and bake for 10-15 minutes, or until the cheese is melted and bubbling. Remove from the oven and sprinkle with fresh parsley before serving.
This makes 4 large servings. Each serving is 14 WW Points. Enjoy!