1 graham cracker crust (be sure to look for one that is free of hydrogenated oils)
1/2 cup key lime juice (about 30 key limes)*
3 egg yolks
1 (14 oz) can of sweetened condensed milk
* I like to use fresh lime juice, but I heard a rumor you kind buy lime juice in the store, too.
1 cup heavy cream
1 teaspoon powdered sugar
1/2 teaspoon vanilla extract
Combine all ingredients into a bowl and mix well. Bake at 350 degrees for 15 mins. Cool and then refrigerate until cool (about an hour).
Whipped cream: Combine all ingredients into a food processor or blender. Blend until it puffs up and looks like whipped cream (more like cool whip than redi-whip). Prepare just before serving.