In a microwave-safe bowl, combine the hearts of palm pasta and the powdered cheese sauce. Microwave on high for 1 minute. Stir well until the cheese is completely melted and evenly coats the pasta.
In a hot pan, add oil and brown the chicken. Season with salt and pepper, then pour in the buffalo sauce. Mix well until everything is combined.
Serve the mac n' cheese topped with buffalo chicken and sprinkle with chives.