Start by gathering and preparing all the ingredients: 600g of pre-cut beef or veal, 250g of mushrooms, 1 onion, 3 garlic cloves, a bunch of parsley, 2 dl white wine, 2 dl beef stock, 2.5 dl cream, 4 tablespoons of butter, 1 tablespoon of flour, 250g of spaetzle, and salt and pepper to taste.
Next, chop the parsley and onion, and mince the garlic.
Heat a pan over high heat and add 1 tablespoon of butter. Sear the beef in batches until browned on all sides. While cooking, season with flour, salt, and pepper.
While the meat is cooking, slice the mushrooms into thin slices.
Once the meat is done, set it aside. Add another tablespoon of butter to the pan, followed by the onion, garlic, and mushrooms.
Once the mushrooms have wilted, pour in the white wine and let it reduce by half.
Add the beef stock and cream, then cook for 5 minutes over medium heat.
Add the seared beef and chopped parsley, then cook for another 3 minutes on low heat. Once done, turn off the heat.
In a separate pan, add the remaining butter and toast the spaetzle over medium heat.