If using pizza stone, place in oven on middle or lower rack.
Preheat over to 425° F.
Transfer apple mixture to pie shell.
Place top crust over pie.
Trim, if necessary, so there is an overhang of approx. 1 inch.
Fold overhang under.
Press top and bottom crusts together with thumb, leaving closely spaced thumbprints around entire circumference of pie.
Mix together egg yolk and 1 tablespoon cream, ½ & ½, or milk.
Brush mixture over entire top crust.
Cut ventilation slits in top crust.