Cook the chickpeas with carrot, celery and onion for about 2 hours. Meanwhile blanch the broccoli, then plunge into a large bowl of ice water. Clean and cut the mushrooms, then cook in olive oil, parsley and garlic. After that, sauté the cardoncelli mushrooms with chickpeas in extra virgin olive oil and garlic. Sauté the broccoli rabe with oil and a clove of garlic.
Serve the soup in a plate and place the broccoli rabe on top.