Combine sugar, flour, and salt in top of double boiler, add milk and egg yolks; mix well. Place over rapidly boiling water & cook 10 minutes stirring constantly, remove from boiling water and add 1 cup of coconut and vanilla.
Cool slightly, then turn into pie shell.
Beat egg whites until foamy. Add sugar 2 tbsp. at a time, beating after each addition until whites stand in peaks.
Spoon your meringue on top and spread out to the edges of the crust. Then, use a knife or spatula to form peaks on pie. Add a small amt of coconut on top and bake in moderate oven (350 degrees) 10 minutes, until browned.
Take out of oven and let cool completely then refrigerate.