HEAT oven to 400°F.
BRUSH crusts lightly with some of the egg. Bake 4 min. Meanwhile, mix remaining eggs with all remaining ingredients until well blended.
POUR into crusts.
BAKE 15 min. Reduce oven temperature to 350°F. Bake 40 to 45 min. or until knife inserted in centers comes out clean. Cool completely. Serve topped with COOL WHIP.