- In a large saucepan, combine the broth, onion and carrots. Add a pinch of salt and pepper. Bring to a boil and let simmer over medium heat for 15 to 30 minutes. When you pierce the vegetables with a fork, they need to be very, very tender.
- Pour the mixture into the blender. Reduce it until smooth to make a soup. Taste and add salt, if needed.