1. In a large skillet, heat oil over medium heat. Add sliced beef strips and cook until browned. Remove beef from the skillet and set aside.

2. In the same skillet, add diced onions and mushrooms. Sauté until softened. Return the beef to the skillet.

3. Pour in beef broth and bring to a simmer. Stir in sour cream, mustard, and paprika. Cook until the sauce thickens.

4. Serve the Beef Stroganoff over hot egg noodles or rice. Garnish with fresh parsley and enjoy!