Preheat oven to 425°F (220°C).

Spread the chilled pie crust with softened butter or margarine.

In a medium skillet, fry bacon over medium heat until crisp.

Drain the fried bacon on paper towels.

Crumble the drained bacon.

Sprinkle the crumbled bacon evenly into the prepared pie crust.

In a separate bowl, whisk together the eggs, shredded Swiss cheese, heavy cream, salt, and nutmeg.

Pour the egg mixture carefully over the bacon in the pie crust.

Bake in the preheated oven for 15 minutes.

Reduce the oven temperature to 350°F (175°C) and continue baking for 25 minutes, or until the custard is set and the crust is golden brown.

Let cool slightly before serving.