Soak chickpeas overnight in cold water, about 12 hours.
Drain off the water and transfer the chickpeas to a large pot. Add the carrots, chard, celery, potato, and onion. Cover with fresh water.
Add caraway, nutmeg, and ginger to pot. Simmer on a low heat until each vegetable is soft, about 30-40 minutes. After 15 minutes, add the tomato purée.
Once the chickpeas and vegetables are soft, remove 5 tablespoons of chickpeas and set aside.
Blend the soup to achieve a rich and creamy texture.
Add the reserved 5 tablespoons of chickpeas back to the soup. Add salt to taste. Stir well, and serve.