Prepare a classic and comforting beef stroganoff using your Thermomix. This recipe is perfect for a cozy dinner with family or friends. Start by sautéing onions and garlic in the Thermomix until fragrant. Add thinly sliced beef and cook until browned. Remove the beef from the bowl and set it aside. In the same bowl, add mushrooms, beef broth, Worcestershire sauce, and a dollop of sour cream. Cook until the mushrooms are tender and the sauce has thickened. Return the beef to the bowl and stir everything together. Serve the beef stroganoff over egg noodles or rice for a hearty and satisfying meal.