In a dutch oven or steamer, begin by fully steaming the spaghetti squash. Once it is steamed, scrape out the seeds with a fork. Then, use a fork to scrape out the remaining spaghetti squash and set aside.
Preheat the oven to 350*.
Place the spaghetti squash in a large bowl then add in the pasta sauce and chicken mixing well to coat all ingredients with sauce.
Pour mixture into a greased 9x13 baking dish.
Top evenly with cheese and bread crumbs.
Bake for 15 minutes or until the cheese is fully melted.