Old Fashioned Butterscotch Meringue Pie
["1 baked pie shell", "3/4 c. packed brown sugar", "1/3 c. flour", "1/2 tsp. salt", "2 c. skim milk", "3 egg whites", "3 Tbsp. margarine", "1 tsp. vanilla", "1/4 tsp. maple flavoring", "1/4 tsp. cream of tartar", "6 Tbsp. sugar", "3 egg substitutes"]
["Combine brown sugar, flour and salt in medium size saucepan; gradually stir in milk.", "Cook over medium heat, stirring constantly, until mixture comes to a boil and is thickened.", "Boil 1 minute; remove from heat.", "Slowly stir into egg substitutes, about 1/2 cup of hot mixture; slowly stir back into remaining mixture in saucepan.", "Cook, stirring constantly, over low heat, 2 minutes.", "Remove from heat.", "Stir in margarine, vanilla and maple flavoring; pour into pie shell."]
["shell", "brown sugar", "flour", "salt", "milk", "egg whites", "margarine", "vanilla", "maple flavoring", "cream of tartar", "sugar", "egg"]