Recipe: Butterscotch pie

Ingredients

• Pastry for a 9-inch single-crust pie, store bought
• 1 cup light or dark brown sugar, packed
• 1/3 cup all-purpose flour
• 1/4 teaspoon salt
• 1-1/4 cups evaporated milk, half-and-half, or milk
• 3 egg yolks, beaten well
• 1/4 cup butter
• 1 teaspoon vanilla extract
• 3 egg whites
• 3 tbsp sugar