Lemon Meringue Pie Filling

Ingredients

• 3 tablespoons butter 
• 0.3 cup cornstarch 
• 4 large egg yolks 
• 0.3 cup juice of lemon fresh
• 1 teaspoon lemon rind grated
• 2 cups milk 
• 0.1 teaspoon salt 
• 1 cup sugar 
• 0.5 teaspoon vanilla extract 

Equipment

• bowl
• frying pan
• sauce pan
• whisk

Directions

1. Whisk together first 3 ingredients in a heavy, nonaluminum, medium saucepan.
2. Whisk together egg yolks, milk, and lemon juice in a bowl; whisk into sugar mixture in pan over medium heat. Bring to a boil, and boil, whisking constantly, 1 minute.
3. Remove pan from heat; stir in butter, lemon rind, and vanilla extract until smooth.