Put the tomatoes in hot water for 30 seconds, remove, peel and cut them into cubes. Heat the oil in a pan, add the finely cut onion and fry for 1-2 minutes. Add the tomato paste and fry for 1 minute.
Add the hot water and crushed broth cubes to the pot. Throw in the fried onion, tomatoes, peeled and diced potatoes. Boil the soup with a lid on low heat for 30 minutes. Add the cream and puree.