Sweet Pastry Dough (for a double crust, unbaked)
1 egg (lightly whisked)
1 cup Sugar
3 tablespoons cornstarch
1/8 teaspoon salt
1/4 teaspoon nutmeg
  grated zest of 1 lemon
2 tablespoons fresh lemon juice
6 cups fresh blueberries (picked over)
1/4 cup graham cracker or shortbread cookie crumbs