Key Lime Pie - cooking recipe

Ingredients

4 eggs, separated
1 (14 oz.) can sweetened condensed milk
1/3 c. Key lime juice or regular lime juice
1/2 tsp. cream of tartar
1/3 c. sugar
1 baked 9-inch pie crust or graham cracker crust

Preparation

Combine egg yolks, condensed milk and lime juice in a heavy saucepan.
Cook over low heat, stirring constantly, until mixture reaches 160\u00b0 (about 10 minutes).
Beat egg whites and cream of tartar at high speed until foamy.
Gradually add sugar, 1 tablespoon at a time, beating until stiff peaks form and sugar dissolves (2 to 4 minutes).
Pour hot filling into pie shell. Immediately spread meringue over filling, sealing to edge.
Bake at 325\u00b0 for 25 to 30 minutes.
Cool before serving.