Lemon Meringue Pie From Mccall's Cooking Scho

• 4 egg yolks
• 4 egg whites
• 1 pastry for one pie crust
• 450 gr sugar
• 120 ml lemon juice
• 24 gr flour
• 14 gr butter
• 6 gr lemon peel (grated)
• 1 gr cornstarch
• 1 gr salt