Toss apples with sugar and 2 tablespoons flour. Arrange 1/2 the apples in pastry-lined
pie pan. Sprinkle with 1/2 the Heath bits, and top with the remaining sliced apples.
In a medium bowl, stir together the oats, brown sugar and 1/4 cup flour. Cut
in butter until mixture resembles crumbs. Stir in walnuts, then sprinkle over apples.
Roll remaining pastry to 1/8-inch thickness. Using a 1 1/2 to 2-inch leaf-shape
cutter, cut out about 20 shapes. Place cut-outs around the edge of the pie (dampen
edge of pastry with water to keep cut-outs in place. Brush pastry with egg. Cover
pie LOOSELY with foil.
Bake the pie at 375 degrees F for 20 minutes.
Remove the foil, and sprinkle with remaining Heath bits.
Bake for 20-25 minutes
more, uncovered, or until apples are tender, and the topping is browned.