Cook the bacon: In a large skillet, cook the bacon over medium heat until crispy, about 7-10 minutes. Once done, transfer the bacon to a paper towel-lined plate to drain excess fat. Let it cool slightly, then chop into bite-sized pieces.
Make the custard filling: In a large mixing bowl, whisk together the eggs and heavy cream until smooth. Add salt, pepper, thyme, and nutmeg, adjusting seasoning to your taste. Stir in the shredded cheese until well combined.
Assemble the quiche: Place the pie crust in a 9-inch pie dish. Evenly spread the chopped bacon in the bottom of the crust. Pour the egg and cream mixture over the bacon and cheese, ensuring an even distribution.
Bake the quiche: Preheat the oven to 375°F (190°C). Bake the quiche for 35-45 minutes, or until the top is golden brown and the filling is set. You can check by inserting a knife into the center—the quiche is done when it comes out clean.
Cool and serve: Allow the quiche to cool for at least 10 minutes before slicing. Serve warm, or refrigerate leftovers for later enjoyment.