Preheat your oven to 375°F (190°C).
If using a pre-made crust, place it in your pie dish. If making your own, roll out the dough and press it into the dish.
In a mixing bowl, whisk together eggs, milk, salt, pepper, and nutmeg until well combined.
Spread cheese, vegetables, and meat evenly over the pie crust.
Pour the egg mixture over the filling, ensuring an even distribution.
Bake for 35-40 minutes or until the quiche is set and golden brown.
Allow it to cool for a few minutes before slicing.