How To make Idaho Chicken Scallop

3 T Butter or margarine
1/2 c Celery,chopped,w/leaves
2 c Milk
2 t Salt
1/2 t Marjoram,dried leaf
4 ea Idaho potatoes
1/2 c Onion,chopped
2 T Flour
1 T Lemon juice
1/4 t Pepper
2 1/2 c Chicken,cooked,cut up
1. Melt butter in a saucepan over low heat.
2. Add onion and celery with leaves; cook until tender.
3. Blend in flour; stir in milk.
4. Cook, stirring constantly, until sauce thickens and comes to a
boil. 5. Stir in lemon juice, 1 1/2 teaspoons salt, pepper, marjoram and
chicken; remove from heat. 6. Pare potatoes; cut in very thin slices.
7. Place sliced potatoes in a greased 1 1/2-quart baking dish;
sprinkle with remaining salt. 8. Pour chicken sauce over potatoes; cover and bake in preheated
425'F. oven 1 hour, or until potatoes are tender.