Ingredients
Method
- Put cold mushrooms, onion, and garlic in a 6-quart slow cooker.
- Season raw chuck with salt and pepper; set over vegetables.
- Whisk broth, tomato paste, Worcestershire, and thyme; pour around roast.
- Cover; cook on low 8 1/2 to 9 hours without lifting lid until beef pulls apart easily.
- At dinner, move beef aside; stir in cornstarch slurry. Cook on high 10 minutes. Pull beef into pieces; serve with mushroom gravy.