Ingredients
Method
- Season beef with salt and pepper and place in crockpot. Add onion, mushrooms, and garlic on top.
- Pour broth, Worcestershire, and mustard over meat. Stir lightly to combine.
- Cook on low 7–8 hours or high 4–5 hours until beef is tender.
- Whisk cornstarch with cold water, stir into crockpot to thicken, and cook 15 more minutes.
- Remove a cup of hot liquid, cool slightly, then stir in sour cream. Return to crockpot and mix. Serve over noodles and sprinkle parsley.