Citrus cheesecake with marmalade glaze

Crust:
1 large egg, separated
1 tablespoon fresh lemon juice
1 teaspoon grated lemon peel
1/4 teaspoon vanilla extract
1 1/4 cups all purpose flour
1/3 cup sugar
1/2 cup (1 stick) unsalted butter, room temperature
Filling:
3 8-ounce packages cream cheese, room temperature
1 2/3 cups sugar
2 tablespoons cornstarch
1 tablespoon plus 2 teaspoons fresh lemon juice
1 tablespoon grated orange peel
2 teaspoons grated lime peel
1 1/2 teaspoons grated lemon peel
1/2 teaspoon vanilla extract
3 large eggs
1 cup sour cream
2/3 cup orange marmalade
Orange slices
Fresh mint sprigs

1. For Crust: Position rack in center of oven; preheat to 425 F. Butter 9-inch-diameter springform pan with 2-inch-high sides. Whisk egg yolk, lemon juice, lemon peel and vanilla in small bowl to blend. Blend flour and sugar in processor. Add butter and process until coarse crumbs form. With machine running, add yolk mixture and blend until moist clumps form. Press dough onto bottom and 1 1/2 inches up sides of prepared pan. Freeze crust 10 minutes.
2. Whisk egg white until foamy. Brush crust lightly with some egg white. Bake until crust is pale golden, about 15 minutes. Cool on rack while preparing filling. Reduce oven temperature to 350 F. for filling: Using electric mixer, beat cream cheese in large bowl until smooth. Add sugar; beat until well blended. Beat in 2 tablespoons cornstarch, 1 tablespoon lemon juice, all citrus peel and vanilla. Add eggs 1 at a time, beating just until blended after each addition. Beat in sour cream. Pour filling into crust. Bake cake until puffed and cracked around edges and center moves only slightly when pan is gently shaken, about 55 minutes. Remove from oven. Run small knife around sides of pan to loosen cake. Cool cake in pan on rack. Refrigerate cake overnight.
3. Boil marmalade and 2 teaspoons lemon juice in saucepan until slightly reduced, about 2 minutes. Spread warm glaze atop cake. Chill cake 10 minutes. Remove pan sides. Transfer cake to platter. Garnish with orange and mint.