Add in all of chopped squash. Stir until coated with onion mixture. Pour in chicken broth and let summer, covered, for 20-30 minutes. Remove from heat and blend. I prefer an immersion blender for ease.Bring back to a low simmer for 5-10 minutes. Add in cream at this point if you wish.
Garnish and top with yougurt, sunflower seeds or anything else you'd like!