Preheat your oven to 375°F (190°C).
Place the pie crust in a 9-inch pie dish and prick the bottom with a fork.
In a mixing bowl, whisk together the eggs and milk until well combined.
Add salt and pepper to the egg mixture for seasoning.
Stir in the shredded cheese and mix thoroughly.
In the pie crust, evenly distribute the chopped vegetables and diced meat.
Pour the egg mixture over the fillings in the crust.
Bake in the preheated oven for 30-35 minutes, or until the quiche is set and lightly golden.
Let the quiche cool for about 10 minutes before slicing.
Garnish with fresh herbs, if desired, and serve warm.