Wash the meat, pat dry and cut into thin slices. Fry vigorously in 1-2 tablespoon hot oil in portions. Season with salt and pepper and place in a bowl. Pour the cream over it and marinate in the refrigerator overnight.
Clean and wash the peppers, peel the onions, cut everything into strips. Clean the mushrooms (wash them if necessary) and cut them in half. Fry the mushrooms and onions in 1 tablespoon of hot oil in portions in a large saucepan. Briefly sauté the paprika strips. Season with pepper and a little salt. Deglaze with almost 3/4 l water and bring to the boil. Stir in onion soup and simmer covered for 10-15 minutes.
Melt the cheese in flakes in the soup. Add the meat and cream and bring to the boil. Season to taste with salt, pepper and noble sweet paprika.