Mix 1 cup stock with tomato paste and flour in slow cooker, then mix in remaining stock.
Brown beef, put in slow cooker.
Sauté onion and garlic, reduce wine by 75%, add to slow cooker.
Add herbs, Worcestershire, salt, pepper, stir, then add carrot, celery and potato.
Slow cook 10 hours on low or 6 hours on high, serve over mash!
