Bring a large pot of water to a boil and cook elbow macaroni according to package directions.
Meanwhile, in a large bowl, mix together the mayo, mustard, seasoned salt, black pepper, onion, celery and chicken. Set aside.
Rinse elbows in cold water and drain very well. Add to the bowl and stir until well coated. Serve or refrigerate until ready to serve.
How to keep pasta from absorbing the mayonnaise:Cold pasta will help keep the mayonnaise from absorbing in to the noodles. So a good thing you can do is either refrigerate the pasta after cooking, or you can simply run cold water over the noodles while in a colander until the past has cooled off.How long does macaroni salad last?Macaroni salad will keep in the refrigerator for up to 3 days, if stored in an air-tight container.Do you eat macaroni salad hot or cold?You can eat it cold or hot but most of the time it's served cold.