Creating this amazing Slow Cooker Beef Stroganoff is simple if you follow these steps:

1. Prepare the Beef: Season the beef cubes with salt and pepper.

2. Sauté Vegetables: In a skillet over medium heat, add a bit of oil and sauté the onion until translucent. Add the garlic and mushrooms, cooking until they are softened.

3. Combine Ingredients: In a slow cooker, add the beef cubes, sautéed onions, garlic, and mushrooms.

4. Add Liquids: Pour in the beef broth, Worcestershire sauce, and Dijon mustard. Stir to combine all ingredients well.

5. Season: Sprinkle in the thyme and mix again, ensuring everything is evenly distributed.

6. Cook: Cover and cook on low for 6-7 hours or on high for 3-4 hours. The beef should be tender when finished.

7. Thicken the Sauce: About 30 minutes before serving, combined the sour cream and flour in a small bowl. Stir this mixture into the slow cooker and let it thicken.

8. Prepare Noodles: Cook the egg noodles according to package instructions.

9. Combine: Before serving, toss the cooked noodles with the beef mixture until well coated.

10. Serve: Garnish with chopped parsley for a fresh touch.

Following these steps will ensure that your Slow Cooker Beef Stroganoff turns out deliciously every time.