1. Combine flour, salt, pepper, and sliced steak in a bag. Shake well. Pour entire contents of bag into bottom of the slow cooker.
2. Add sliced onions, fresh mushrooms, celery, water, beef bouillon powder, soy sauce, sesame oil, and white wine. Stir to combine. Cook on high for four hours. Lower to warm.
3. 30 minutes before ready to serve, add egg noodles. If there is very little liquid left, add one cup water along with noodles. Raise to high and cook for an additional 30 minutes