Position the oven rack in the lower third of the oven and preheat to 350F.
On a lightly floured surface, roll pie dough into a 12-inch circle. Line a 9-inch pie dish with the dough, pressing into the bottom and up the sides. Tuck the excess dough around the edges under, and crimp as desired.
In a medium bowl, whisk together the eggs, cream, salt, and pepper. Stir in ¾ cup cheese, ½ cup bacon, and green onion. Pour egg mixture into the prepared crust. Place on a rimmed baking sheet.
Bake in the lower third for 25 minutes. Sprinkle the top of the filling with the remaining ¼ cheese and remaining ¼ cup bacon. Continue baking for 15 to 20 minutes more or until a knife inserted in the center comes out clean. Cool for 10 minutes before slicing and serving. Garnish with additional green onion, if desired.
