Pie: Pour maple syrup in small saucepan and bring to boiling point. Add milk
and cream; stir and cook over low heat. Do not boil. Add butter, vanilla extract
and eggs; mix and cook over low heat until mixture thickens.
Pour mixture into baked pie shell. Set aside.
Heat oven to 180 degrees F.
Meringue: Place egg whites and sugar in double boiler. Mix with electric beater
at low heat until mixture forms peaks.
Spread mixture over pie and cook in oven until meringue is brown.