Cut the chicken fillet into strips and fry in the oil. Season with the spices, then set aside.
Sauté the peppers cut into pieces with the leek rings in the pan that has already been used. Pour in the broth, add the meat and let it simmer for about 15 minutes. Pour in a little more broth if necessary. Thicken sauce; possibly seasoning. Stir in the sour cream.