Directions

1. In a medium saucepan, combine sugar, flour and salt over a medium heat; gradually stir in milk. Cook and stir over medium heat until the mixture is thick and bubbly. Reduce heat to low and cook 2 minutes more. Remove the pan from heat.
2. Separate the egg yolks from whites. Beat the egg yolks slightly. Gradually stir 1 cup of the hot mixture into yolks. Return the egg mixture to the saucepan and bring the entire mixture to a gentle boil. Cook and stir 2 minutes before removing the pan from heat.
3. Stir butter, vanilla, and coconut into the hot mixture. Pour the hot filling into the baked pie crust. Cool. Cover and chill to store the pie if not serving immediately.