Meringue Pie Topping

It is important not to let the meringue mixture get to stiff peaks before you add the cornstarch mixture. You can cook the cornstarch mixture before you whip the egg whites if it is difficult for you to do both at the same time, but only just before (within a few minutes), and you must transfer the cornstarch mixture from the hot pan to a bowl or it will continue to cook and thicken from the residual heat.