Combine stock, Worcestershire sauce, soy sauce, apple cider vinegar, and Montreal steak seasoning. Set aside.
2 cups stock, 1 tbsp Worcestershire sauce, 1 tbsp low sodium soy sauce, 1 tbsp apple cider vinegar, t tbsp Montreal steak seasoning
Place carrots and onions in the bottom of a slow cooker.
1 cup chopped carrots, 1 medium onion
Add sirloin roast on top of carrots and onions. (Note: If your roast has twine, remove before placing the roast in the slow cooker.)
1 sirloin roast
Pour stock mixture over the roast.
Cook on low for 10 hours.
Remove roast and shred the meat with a fork.
Remove vegetables. Keep if you plan to eat them with the roast.
Ladle the liquid from the slow cooker into a saucepan. Bring to a boil.
1 tbsp cornstarch, 1 tbsp cold water
Combine cornstarch with cold water.
Whisk in the cornstarch and water mixture.
Cook for about 1 minute, whisking constantly. Reduce the heat to low. Cook for several minutes while the liquid thickens to a gravy, whisking occasionally.
Nutrition information is an estimate for one serving.