Key Lime Pie
["1 vanilla wafer or graham crumb crust", "3 egg yolks", "1 (14 oz.) can sweetened condensed milk", "1/2 c. fresh lime juice or bottled lime juice", "whipped topping or whipped cream", "1 drop green food coloring"]
["Preheat oven to 325\u00b0.", "In a large mixer bowl, beat egg yolks; stir in sweetened condensed milk, lime juice and green food coloring, if desired.", "Pour into prepared crust.", "Bake 20 to 25 minutes.", "Cool.", "Chill for 3 to 4 hours.", "Top with whipped topping.", "Refrigerate leftovers."]
["vanilla wafer", "egg yolks", "condensed milk", "lime juice", "cream"]