Graham Cracker Pie
["1 c. sugar", "3 Tbsp. flour", "1/2 tsp. salt", "2 1/2 c. milk", "1/2 stick margarine", "3 egg yolks", "1 tsp. vanilla"]
["Mix dry ingredients; add milk.", "Beat egg yolks and add to mixture.", "Add salt and margarine.", "Cook over medium heat until it thickens.", "Remove from heat and stir in vanilla.", "Pour in graham cracker crust.", "Beat egg whites and spread over filling.", "Bake at 400\u00b0 until meringue is brown in 9-inch pie plate."]
["sugar", "flour", "salt", "milk", "margarine", "egg yolks", "vanilla"]