Season broth with salt and pepper. Gently add meatballs to the simmering pot. Continue cooking covered for 30 minutes longer.
Add rough chopped herbs. Mix well and continue cooking for 30 minutes longer.
Add cubed butternut squash and simmer on low for 1 hour longer.
Finish soup by warming olive oil until warm. Turn off flame and add dried mint. Allow to infuse for 10 to 15 minutes. Add one teaspoon of the infused mint to each bowl of soup.
Recipe by My Persian Kitchen at http://www.mypersiankitchen.com/asheh-kadoo-halvai-butternut-squash-soup/