Water the refractory clay pot for about 10 minutes. Peel and slice onions and potatoes. Clean, wash and cut the peppers into pieces. Layer prepared vegetables in the clay pot.
Season with cumin, salt and pepper. Pour the broth over it. Put the pot into the cold oven and cook in the electric cooker at 225 ° C (gas: level 4) for about 40 minutes. Mix sour cream, crème fraîche and tomato paste.
Season to taste with salt, pepper and paprika and spread on the vegetables 10 minutes before the end of the cooking time. Serve sprinkled with caraway seeds.