Combine cornstarch, sugar and salt; mix well.
Gradually stir scalded
milk into cornstarch mixture. Bring to a boil, stirring
constantly, and boil for two minutes, or until thickened and shiny.
Add a small amount of the hot mixture to eggs and beat until
well blended.
Return to pan and beat for two minutes over medium
heat until slightly thickened, being careful not
to let mixture curdle.
Remove from heat and add vanilla and margarine, mixing
until smooth.
Pour through sieve to strain out lumps.
Place plastic wrap directly over filling; set aside
to cool.
Add coconut extract and half the coconut to the
cooled pie filling. Pour filling into pie shell;
chill.
Spread whipped cream over pie,
mounding in center.
Sprinkle with remaining coconut.