First, place your roast in the slow cooker. (If you are adding carrots and potatoes, add them now).
Mix the beef bullion cubes with water and add to the slow cooker.
Add the chopped mushrooms, onions, and garlic.
Sprinkle the meat with the Worcestershire sauce and a teaspoon of Montreal Steak Seasoning.
Cover the crockpot and cook on low for 6 hours or until the meat is tender.
Notes
***If you have a different cut of meat (such as a bottom round roast), you will need a longer cooking time than if you have a chuck roast.For the beef bullion we like to use GF Herb-Ox but you could also use beef stock or broth.