Preheat oven to 350˚.
In a mixing bowl, combine lemon juice, lemon rind, sugar, flour, butter, egg yolks and salt.
Mix well and stir in milk.
Gently stir in whipped egg whites.
Pour into prepared pie shell, place on a baking sheet to catch any spills and place in oven.
Bake at 350˚ for 15 minutes, reduce heat to 300˚ and continue baking an additional 45 minutes or until pie is just slightly jiggly. It should be very lightly browned.
Top with whipped cream or serve naked (the pie, not you) – it’s great either way!