Easy Crockpot Roast for Sandwiches

INGREDIENTS:

1 lb Chuck or other cut beef
1 Onion; sliced
2 Garlic cloves;chopped
2 Carrots; sliced
2 Celery stalks; diced
1 cn Stewed Tomatoes; 14.5 oz.
1 pk Lipton Onion/Mushroom Soup
1 tb Kitchen Bouquet
1 tb Worcestershire sauce
1 cn Mushrooms (optional)