Preheat the oven to 375°F.
Evenly distribute the ham, cheddar cheese, and scallions in the pie crust.
In a medium bowl, whisk together the eggs, heavy cream, salt, black pepper, and ground nutmeg.
Pour the egg mixture over the ham and cheese in the pie crust.
Bake the quiche in the preheated oven for 35-40 minutes, or until the filling is set and the crust is golden brown.
Let the quiche cool for 5 to 10 minutes before slicing and serving.
**If making in advance, reheat at 350℉ for 15 to 20 minutes.