Chop the cooked chicken into bite size pieces. Boil noodles according to the directions on package.
In another pan, melt butter and sauté celery and onion, usually 3-4 minutes. Add broccoli slaw, chicken, soup, milk, Velveeta, pepper; mix until well blended.
Drain spaghetti and add to chicken mixture, mix well. Bake in a large greased baking pan for 20 minutes at 350° or until bubbly.
Recipe by Coupon Cutting Mom at https://couponcuttingmom.com/dinner-last-night-chicken-spaghetti/