Beef Stroganoff

Directions

1. 1
   Saute mushrooms and onions in large skillet in margarine until soft; remove from skillet and set aside.
2. 2
   slice the meat into strips the size of a pencil, 3 to 4 inches long and brown in skillet.
3. 3
   reduce heat to simmer.
4. 4
   return vegetables to skillet and add 1 cup water, dry mustard and pepper.
5. 5
   cover and simmer 45 min.
6. 6
   or until meat is tender, adding more water if necessary.
7. 7
   combine flour with 1/4 cup water, stir until smooth.
8. 8
   stir into meat mixture and cook until sauce thickens, about 2 min.
9. 9
   reduce heat to low.
10. 10
    just before serving, stir in sour cream.
11. 11
    serve over hot buttered noodles.