Cut the meat into fine strips, season, dust a little with flour and fry quickly. Lift out the meat, then brown the onions and garlic in the fat until translucent. Add the chopped mushrooms and parsley and sauté a little, then season with salt and pepper (season with soup cubes if necessary).
Pour the cream on top and let it boil down a little without the lid. Mix the sour cream with 1 teaspoon flour, stir into the simmering mushrooms and bring to the boil. Season to taste with a little white wine and lemon juice. Add the meat and let it steep for 5 - 10 minutes over a low heat. Adjust the consistency of the sauce with beef broth.
To do this, cook wide ribbon noodles according to the instructions on the packet.