Key Lime Pie

1. 1

   In an electric mixer with the wire whisk attachment, beat the egg yolks and lime zest at high speed until very fluffy, about 5 minutes.

2. 2

   Gradually add the condensed milk and continue to beat until thick, 3 or 4 minutes or longer.

3. 3

   Lower the mixer speed and slowly add the lime juice, mixing just until combined, no longer.

4. 4

   Pour the mixture into the crust. Bake for 10 minutes, or until the filling has just set. Cool on a wire rack, then refrigerate for at least two hours.

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