Roast squash at 425 degrees for 30 minutes or until tender. Let cool. At same time saute onions over medium heat in non-stick skillet until translucent. Let cool.
In a Vita-mix Blender or Food Processor in batches process until smooth, squash, onions, and chicken stock.
In a large pot add the batches and cook on medium heat. Add remaining ingredients. Cook 15 minutes.
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