Key Lime Pie - cooking recipe

Ingredients

4 eggs, separated (reserve 3 whites for meringue)
1 can (14 oz.) sweetened condensed milk
1/2 c. lime juice
2 tsp. grated lime peel
few drops green food coloring
1 baked 9-inch pie shell
1/2 tsp. cream of tartar
1/2 c. sugar

Preparation

Beat egg yolks; stir in milk, lime juice, peel and food coloring.
Beat one egg white until stiff, fold into mixture.
Turn into pie shell.