Ingredients:
Stew Beef [2 lbs]
2 Cups mushrooms [sliced]
1 C onion
1/4 C butter
2/12-3 C beef broth
1 small can tomato paste
1 tsp dry mustard
1 C sour cream
Rice or Noodles
Brown steak, onion, and mushrooms in melted butter. Drain and put into crock-pot.
Mix beef broth with tomato paste and dry mustard. Add to crock-pot. Cook on low for 6-8 hours.
About an hour before serving, mix 1/2 tsp salt, 2 TB flour, and 1/2 water with whisk and add to crock-pot. Shortly before serving, add sour cream. Serve over rice or noodles.