Melt the 1/2 stick of unsalted butter in the microwave.

Add in the sugar and stir, it should distribute and dissolve fairly easy.

Add in the graham cracker crumbs and mix.

Pour the crust mixture into the pie pan and push it firmly up into the sides and into the bottom of the pan creating an even layer on all sides.

Now place the pie crust into the pre-heated oven of 350°F and bake for 10 minutes; meanwhile, it is baking we can mix up the pie filling.

Separate the egg yolks from the egg whites.

In the same bowl the yolks are in add in the two 14 oz sweetened condensed milk, and mix until the yolks are thoroughly incorporated into the mixture.

Now add in the key lime juice and mix again.

Now you will have a very yellow key lime pie mixture.

If you want you can add some blue food coloring to give the mixture a green tint.

Now just pour the mixture into the cooked gram cracker crust.

Bake the pie in the oven at 350°F for 30 minutes.

While the pie is baking, make the garnish for the pie.

After the pie is done baking, let it cool for 30 minutes before it goes into the fridge.

To make the whipped cream: Beat the heavy whipping cream in a mixture on high for a few minutes and you will see it become light and fluffy.

Add in the sugar, cream of tartar, and vanilla extract while it is being whipped.

For the limes, slice them into thin circles, cut and twist them, and place them into the whipped cream dollops that I piped onto the slice right before serving the pie.