Bring a pot of salted water to a boil and cook the egg noodles according to package directions until al dente.
While noodles cook, season the beef strips with sea salt and black pepper.
Heat the ghee in a large skillet over medium-high heat and sear the beef until browned, then remove from the pan and set aside.
In the same skillet, add the diced onions and sliced mushrooms, sautéing until the mushrooms are golden and the onions are translucent.
Stir in the minced garlic and smoked paprika, cooking for 30 seconds until fragrant.
Pour in the beef broth and Dijon mustard, scraping the bottom of the pan to release any browned bits, and simmer for 2 minutes.
Reduce the heat to low and stir in the Greek yogurt until the sauce is smooth and creamy.
Add the beef back into the skillet and toss to coat in the sauce until heated through.
Serve the beef and mushroom mixture over the cooked egg noodles and garnish with freshly chopped parsley.