Scalloped Potatoes
["6 medium potatoes", "1 tsp. salt", "3 Tbsp. butter", "2 Tbsp. flour", "1/2 Tbsp. pepper", "2 Tbsp. chopped onion", "3 c. milk"]
["Peel the potatoes and then slice them thin.", "Make a white sauce out of the butter, flour and milk. Put half of the potatoes in a greased 2-quart casserole; cover with half of the sauce, salt, pepper and onion.", "Add the remaining sauce.", "Cover and bake in a moderate oven (350\u00b0) for about 1 hour.", "Uncover and continue baking until top is browned."]
["potatoes", "salt", "butter", "flour", "pepper", "onion", "milk"]