Sweet Potato Pie with Marshmallow Meringue

Name: Sweet Potato Pie with Marshmallow Meringue
Ingredients: 1 1/2 cups graham cracker crumbs (made from about 7 1/2 ounces graham crackers, finely ground in processor); 3 tablespoons sugar; 6 to 7 tablespoons unsalted butter, melted; 3 pounds medium red-skinned sweet potatoes (yams); 1 14-ounce can sweetened condensed milk; 1/4 cup sugar; 2 large eggs; 2 teaspoons fresh lemon juice; 1 teaspoon ground cinnamon; 1/2 teaspoon ground nutmeg; 1/4 teaspoon salt; 1 7-ounce jar Kraft Jet-Puffed Marshmallow Creme; 3 large egg whites; 1/8 teaspoon salt