Preheat oven to 350.
In medium-sized mixing bowl combine graham cracker crumbs, sugar, and melted butter until crumbs are fully coated. Press into a 9-inch pie pan, forming a crust. Have crumbs go up the side of the pie pan.
1 1/2 cups graham cracker crumbs, 1/3 cup sugar, 5 Tbsp butter
Bake crust for 8 minutes.
In medium-sized mixing bowl whisk together lemon juice, sweetened condensed milk, and egg yolks until smooth.
2/3 cup lemon juice, 2, 14 oz. cans sweetened condensed milk, 3 egg yolks
Pour lemon mixture into warm pie crust.
Bake for 10-12 minutes or until center is no longer moves, although it may be slightly jiggly.
Remove from oven and let sit on counter for 10 minutes. It will finish setting as it cools.
Chill in refrigerator 2-3 hours or overnight to completely set.
Top with whipped cream.
Garnish with lemon zest and lemon slices.