Preheat the oven to 400 degrees.
Lightly grease a 9 inch pie pan.
In a large bowl, combine the lemon juice, sugar, eggs, milk, vanilla, coconut and flour. Stir until well blended and pour into pie dish. Dot the mixture with butter.
Place pie pan on a cookie sheet.
Bake for about 35 minutes or until set.
Cool slightly and serve warm or chill and serve cold.