Prepare the soup base. Place the chickpeas in a saucepan and cook in plenty of water for 120 minutes. Start preparing the vegetable broth. Pour 1 liter of cold water over the leeks, celery, and carrots, add a whole onion, and put on the fire. When the water boils, add 2 sprigs of thyme. Cook for 20 minutes. Strain the finished broth through a sieve.
Prepare the vegetables for the soup. Heat the oil in a saucepan and fry the onion for 1 minute. Then add the grated carrots, after 1 minute add the pepper to the pan. Sauté everything together for another 3 minutes. Then add the chopped tomatoes with their juice and the paprika. Cook for another 5 minutes. Add the garlic at the end and cook for another minute.
Combine the bases and finish cooking. Add the strained vegetable broth to the pan and bring to a boil. Then add the boiled chickpeas. Cook for 10 minutes. Add the spinach and bay leaf to the soup and cook for another 5 minutes. At the end of cooking, add salt, pepper and a sprig of thyme, cover and let it sit for about 10 minutes.