Preheat your oven to 180°C (350°F) and lightly grease your pie dish.
Sauté chopped vegetables in a skillet over medium heat until tender and fragrant, about 5 minutes. Let them cool slightly.
In a large mixing bowl, crack in the eggs and whisk thoroughly until the mixture is smooth and slightly frothy.
Add the shredded cheese, milk or cream, chopped herbs, salt, and pepper to the eggs. Whisk again until all ingredients are well combined.
Fold in the sautéed vegetables and cooked meats, distributing them evenly throughout the batter.
Pour the batter into the prepared pie dish, spreading it out with a spatula to create an even layer.
Bake in the preheated oven for 25-30 minutes, until the edges are golden brown and the center is just set with a slight jiggle.
Remove from the oven and let the quiche rest for about 5-10 minutes to allow the filling to set further.
Slice into wedges and serve warm, garnished with fresh herbs if desired. Enjoy the comforting, custardy texture with crispy edges!