Tropical Pie
["1 c. sugar", "1/3 c. cornstarch", "1/4 tsp. salt", "1 c. unsweetened pineapple juice", "1/2 c. orange juice", "1 Tbsp. lemon juice", "3 slightly beaten egg yolks", "1 Tbsp. butter or oleo", "1 tsp. vanilla", "1 baked 9-inch pastry shell"]
["In saucepan, combine sugar, cornstarch and salt.", "Blend in fruit juices and bring to a boil over medium heat, stirring constantly.", "Cook and stir 2 minutes; remove from heat.", "Stir small amount hot mixture in egg yolks.", "Return to hot mixture; bring", "to", "a", "boil", "for", "1", "minute, stirring constantly.", "Remove from heat.", "Add butter and vanilla; cool."]
["sugar", "cornstarch", "salt", "pineapple juice", "orange juice", "lemon juice", "egg yolks", "butter", "vanilla", "pastry shell"]