Cut squash lengthwise and scoop out any seeds. Place on a foiled lined baking pan with the flesh side down. Bake in a 400 degree oven for 1 hour and 30 minutes. Test for doneness and bake additional time if needed.
Allow squash to cool. Scoop out pulp and mash.
In a large saucepan, sautee onion. Add chicken broth, cinnamon, garlic powder and salt. Add squash and cook on low heat for 5 minutes.