Potatoes George

Directions

1. 1
   Slowly add milk to flour, salt and mustard.
2. 2
   Cook over low heat until smooth and thick.
3. 3
   Add cheese; stir until melted.
4. 4
   Peel and cook potatoes to fill 1 1/2-quart casserole 3/4 full.
5. 5
   Cook until nearly done about 15 minutes.
6. 6
   Slice.
7. 7
   Put a bit of sauce in bottom of greased casserole.
8. 8
   Add a layer of potatoes and onions, then more sauce until all used.
9. 9
   Bake at 325° for 15 minutes until bubbly.