Potato And Chicken Casserole

2 chicken breasts, cooked and cut
4-6 medium potatoes, peeled and sliced
2 cans green beans, drained

White Sauce:
3 T. margarine
3 T. flour
1 t. salt
1/4 t. pepper
3/4 t. dry mustard
1 1/2 C. milk
3/4 C. mayonnaise

Preheat oven to 350 degrees. In a 9x13 pan layer potatoes, green beans, and chicken. In a saucepan melt the margarine. Gradually add flour, salt, pepper, and dry mustard. Add milk all at once and mix with a whisk to keep from clumping. Boil for 1 minute. Remove from heat and add mayonnaise. Pour over the potatoes, beans, and chicken. Cover and bake for 45 minutes. My family loves to add a little season-all to the top before they eat it.

From: Danae Wood