Fry the finely chopped onion in oil, add the paprika powder and immediately add the soup. Cut the fish into pieces and add the garlic (pressed), cook everything for about 5 minutes. Stir in the crème fraîche, season with salt and pepper.
Tip: If you want the sauce to be a little thicker, mix the crème fraîche with a little flour and 2 tablespoons of water and bring to the boil briefly.