Place flour in a large resealable plastic bag. Add beef, a few pieces at a time, and shake to coat. In a large skillet, brown meat in oil in batches; drain. Transfer to a 5-qt. slow cooker. In a small bowl, combine the tomato soup, water, bouillon and seasonings; pour over beef. Add the onions, potatoes, carrots, mushrooms and celery. Cover and cook on low for 4-5 hours or until meat is tender. Discard bay leaf. Serve with egg noodles if desired.