INGREDIENTS:
3 large egg yolks (room temperature)
1 can sweetened condensed milk
1/2 cup key lime juice
2 teaspoons lime zest (grated)
1 (9-inch) graham cracker pie crust
Optional garnish: whipped heavy cream (or whipped topping)

DIRECTIONS:
1. Gather the ingredients. Preheat oven to 375 F.
2. In a medium bowl, combine the egg yolks and sweetened condensed milk.
3. Beat with a mixer at high speed until light and fluffy, about 5 minutes.
4. Gradually beat in lime juice and lime zest.
5. Pour mixture into the crust.
6. Bake in preheated oven for about 15 minutes to cook the eggs.
7. Cool slightly and then refrigerate.
8. Serve with a dollop of whipped cream or whipped topping if desired.