Preheat oven to 400 degrees and crease 9x13 pan and set aside.
Boil chicken until soft and then shred with a fork.
Cut squash in half and scrape the seeds out. microwave for approximately 8 minutes or until squash is able to be shredded.
While squash is cooking, sauce the onion for 5-7 minutes, until softened and mostly cooked through.
Shred the squash with a fork and place in a large bowl. Use clean towel and press any liquids out.
Add the onion mixture to the bowl with the chicken, buffalo sauce, ranch, egg whites, garlic powder, salt and pepper. Stir well.
Pour minute into greased pan.
Bake at 400 degrees for 30-40 minutes.
Cut into 12 equal parts and enjoy!