Step 1

Bring a pot of salted water to a boil. Add the noodles and cook according to the package directions. Drain and toss with 2 tablespoons of the butter and 1 tablespoon of the parsley. Keep warm.

Step 2

Meanwhile, melt the remaining 2 tablespoons butter over medium-high heat in an extra-large skillet. Add the beef, season with the paprika and some salt and pepper and cook until browned on all sides but still pink in the middle, 2 to 3 minutes. Remove from the skillet and set aside.

Step 3

Add the mushrooms, onions and thyme to the skillet and season with salt and pepper. Cook until beginning to soften, 2 to 3 minutes. Add the hot stock and wine and cook for a minute until it reduces. Lower the heat and stir in the heavy cream and mustard. Add the beef back in, along with any juices on the plate. Cook for 1 minute so the beef is heated through. Turn off the heat and stir in the sour cream. Taste and adjust the seasoning.

Step 4

Serve over the buttered noodles and garnish with the remaining parsley.