Key Lime Pie

Directions

1. 1
   Combine egg yolks, condensed milk and lime juice in a heavy saucepan.
2. 2
   Cook over low heat, stirring constantly, until mixture reaches 160° (about 10 minutes).
3. 3
   Beat egg whites and cream of tartar at high speed until foamy.
4. 4
   Gradually add sugar, 1 tablespoon at a time, beating until stiff peaks form and sugar dissolves (2 to 4 minutes).
5. 5
   Pour hot filling into pie shell. Immediately spread meringue over filling, sealing to edge.
6. 6
   Bake at 325° for 25 to 30 minutes.
7. 7
   Cool before serving.