1. FILLING.
2. Preheat Oven to 350 degrees.
3. Combine half& half and butter in a large saucepan and bring to a boil over medium heat.
4. Whisk together sugar, eggs, cornstarch, vanilla and salt in a medium bowl until the cornstarch is completely incorporated and the mixture is well blended.
5. Gradually add the cornstarch mixture to the half& half mixture while stirring constantly with a wire whisk.
6. Continue stirring while cooking until mixture is thickened.
7. This should take about 1 minute.
8. Add the marshmallows and 3/4 cup of the coconut.
9. Cook while stirring until the marshmallows melt and the mixture is well blended.
10. Pour into pre-baked pie shells.
11. Refrigerate for at least 2 hours.
12. MERINGUE.
13. Beat the egg whites and the cream of tartar in a large bowl until soft peaks form.
14. Add the sugar, a small amount at a time while beating constantly until stiff peaks form.
15. Spread 1/2 the meringue mixture over each pie to the edge of the crust.
16. Sprinkle 1/4 cup of the remaining coconut over the top of each pie.
17. Bake for 12-15 minutes until or until the meringue is lightly browned.
18. Refrigerate until serving.