1. In a medium pot, heat margarine and sauté onions, squash and garlic until the onions are tender.
2. Add water and bring to a boil, reduce heat to a simmer.
3. Cook until the squash is tender. Add chives, Cubes and brown sugar to taste.
4. Remove the soup from the heat and using an immersion blender blend until smooth. (If using a standard blender do so with caution as this is very hot liquid)