Spinach Casserole
["1 1/2 c. chopped, cooked spinach", "3 eggs", "1 1/2 c. grated Cheddar cheese", "2 Tbsp. butter", "2 Tbsp. flour", "3/4 c. milk", "1 tsp. chopped onion"]
["Make cream sauce with butter, flour and milk.", "When smooth, add onion and cheese and stir until melted.", "Add beaten egg yolks and spinach, then fold in stiffly beaten egg whites.", "Pour into greased casserole and bake at 350\u00b0 until knife inserted in center comes out clean.", "Set casserole in pan of hot water to bake.", "Bake 45 to 55 minutes."]
["eggs", "Cheddar cheese", "butter", "flour", "milk", "onion"]