How to cook
For the fish heads:
Put the listed ingredients for them in a pressure cooker. After it reaches the right pressure, let simmer for 20 min.
Once you open the pressure cooker, take the heads out and debone them, strain the broth in a pot and put it back on the stove.
For the soup:
In the pot on the stove, add the onions and whole potatoes. 5 min. after boiling point, add the carrot, pepper and diced potatoes.
Once it comes to a boil again, wait 10 min. and take the whole potatoes out. Add the oil, tomato and all the spices - boil for 5 min. with them.
Mash the whole potatoes and return them to the pot. Flavor your soup with a squeezed lemon and remove from the stove.