In medium bowl, combine milk, lemon juice, and zest; blend in egg yolks. Pour into cooled crust.
Preheat oven to 325 degrees F.
Beat egg whites with cream of tartar until soft peaks from. Gradually beat in the sugar until stiff. Spread over filling; seal to edge of crust. Bake for 12 to 15 minutes or until meringue is golden brown.
Consumption of raw or undercooked eggs, shellfish and meat may increase the risk of foodborne illness.