Preheat oven to 425 degrees. Line pie pan with pie crust and set aside.
Mix milk, eggs, melted butter, oats, sugar, and coconut in a large mixing bowl. Pour into the prepared pie crust. Lightly sprinkle the top of the pie with more coconut if desired.
Bake at 425 for 10 minutes, and then reduce the temperature to 350 and continue baking for 30 minutes or until the center is set and a knife comes out clean when inserted into the center.