Preheat oven to 400 F
On a baking sheet, bake the frozen pie crust shell for 5-10 minutes, until slightly golden brown
Then reduce oven temperature to 350 F
In a bowl, whisk eggs, milk, salt, and black pepper
In another bowl, mix shredded cheese, flour, scallions, chives, and parsley
On the baking sheet, to the cooked crust shell, add the cheese mixture
Pour over the milk mixture
Bake quiche for 40-50 minutes, until custard is set and golden brown