Onion & Cheese Pie

Directions

1. 1
   Line pie plate with pastry.
2. 2
   Saute onion in butter until tender; spread over pastry.
3. 3
   Spread cheese over onion in pie pan.
4. 4
   Blend 3 eggs slightly beaten, plain flour and mustard.
5. 5
   Beat, making sure mixture is smooth.
6. 6
   Add undiluted can of soup, and 1/2 cup milk; stir until blended.
7. 7
   Pour over cheese & onion.
8. 8
   Bake 40 - 60 minutes in preheated oven at 350 F OR 180 Celsius.
9. 9
   Finished when firm to the touch, and light brown on top.
10. 10
    Let stand 20 minutes before serving.