Citrus Cranberry Pie

Preheat oven to 450°. Toss together first 8 ingredients., On a lightly floured surface, roll half of dough to a 1/8-in.-thick circle; transfer to a 9-in. pie plate. Trim crust even with rim. Add filling., Roll remaining dough to a 1/8-in.-thick circle; cut into strips. Arrange over filling in a lattice pattern. Trim and seal strips to edge of bottom crust; flute edge. Brush lattice with egg; sprinkle with additional sugar. , Bake 10 minutes. Reduce oven setting to 350°; bake until golden brown, 40-45 minutes, covering edge with foil if crust is getting too dark. Cool completely on a wire rack; refrigerate until serving., Meanwhile, beat whipping cream until it begins to thicken. Add remaining ingredients; beat until soft peaks form. Refrigerate until serving. Serve with pie.