Making Slow Cooker Beef Stroganoff is simple if you follow these straightforward steps:

1. Sear the Beef (Optional): In a skillet, heat olive oil over medium-high heat. Add the beef stew meat and sear until browned on all sides. This step enhances the flavor but can be skipped if short on time.

2. Add Ingredients to Slow Cooker: Transfer the seared beef to the slow cooker. Add the diced onion, minced garlic, and sliced mushrooms.

3. Prepare Broth Mixture: In a separate bowl, combine beef broth, Worcestershire sauce, Dijon mustard, paprika, salt, and pepper. Mix well.

4. Pour Over Beef: Pour the broth mixture over the beef and vegetables in the slow cooker. Stir gently to combine.

5. Cover and Cook: Place the lid on the slow cooker. Cook on low for 6-8 hours or on high for 3-4 hours until beef is tender.

6. Prepare Sour Cream Mixture: About 30 minutes before serving, mix the sour cream and cornstarch in a small bowl until smooth.

7. Add Sour Cream Mixture: Stir the sour cream mixture into the slow cooker. Cover and continue cooking for an additional 30 minutes.

8. Check Consistency: If the sauce is too thin, allow it to cook with the lid off for a little while to thicken.

9. Serve: Serve over cooked egg noodles or rice. Garnish with fresh parsley for added flavor and presentation.

These organized steps guide you through making a warm and comforting Slow Cooker Beef Stroganoff effortlessly.