Key Lime Pie

1 prepared (unbaked) graham cracker crust
1 (14 oz) can sweetened condensed milk
zest of 1 lime
1/2c. key lime juice (or bottled lime and lemon juice)
4 egg yolks, beaten

Combine ingredients, pour into pie shell.  Bake at 375 for about 15 mins or until a knife inserted in the center of the pie leaves a mark.  (Don't let the pie start to brown or turn golden as it will be overdone).

Tips:
Zest the lime, then squeeze the fresh lime juice into a 1/2c. measuring cup.  Add a few tablespoons of bottled lemon juice, and then bottled lime juice to equal 1/2 cup total.

This recipe gives a nice thin layer of pie filling.  For a full, thick pie the recipe could be doubled.