3. In a large bowl, whisk together the eggs, cream, milk, salt, pepper, and nutmeg until well combined. Stir in the cheese, along with any additional fillings you desire, such as the bacon, ham, spinach, and caramelized onion.
4. Pour the egg mixture into the pre-baked crust. Place the quiche in the oven and bake for 40-45 minutes, or until the quiche is set in the center and the top is lightly golden.
5. Remove the quiche from the oven and let it cool for a few minutes. Slice and serve warm, or allow to cool completely if you prefer to serve your quiche at room temperature.
Enjoy the intricate flavors and delicate texture of this classic dish, which is sure to become a cherished addition to your recipe collection.