Add the onion, garlic, carrots, celery to the crockpot. Place meat on top of vegetables. Add the worcestershire sauce, kitchen bouquet, dry soup mix. Last, pour the stewed tomatoes over the top.
Cook on Low heat for 7 hours then add the mushrooms and let it cook for an hour or so more. When done, remove the meat and if a thicker gravy is desired, stir in 2 tb flour and set crockpot to high while stirring for a minute or so.
Serve with rice or noodles, or add cut up potatoes with the vegetables.