Step 1: Prepare the Ingredients : Slice the mushrooms, chop the onions, and mince the garlic. Cut the beef into even-sized strips if not already done.
Step 2: Load the Slow Cooker : Place the beef, mushrooms, onions, and garlic at the bottom of the slow cooker.
Step 3: Make the Flavor Base : In a bowl, whisk together: Beef broth ,Worcestershire sauce,Dijon mustard,Paprika,Salt u0026 pepper,Pour this mixture over the beef and vegetables.
Step 4: Slow Cook : Cover and cook on LOW for 5–6 hours or HIGH for 3–4 hours, until beef is very tender.
Step 5: Make the Sauce Creamy : Add sour cream and mix gently. Want it thicker? Stir in the cornstarch slurry and cook for an additional 5–10 minutes.
Step 6: Cook the Egg Noodles : Boil egg noodles until tender, drain, and toss with a bit of butter.
Step 7: Serve : Place a scoop of egg noodles in a bowl or plate. Spoon the creamy beef stroganoff over the top. Sprinkle with fresh parsley.