For a richer flavor, consider adding a pinch of nutmeg or a dash of Worcestershire sauce to the egg mixture. Feel free to experiment with different cheeses, such as Gruyere or Emmental, to create your own unique flavor profile. If the pastry edges are browning too quickly during baking, cover them loosely with aluminum foil. This quiche can be served warm or at room temperature. It's also delicious cold, making it a great option for lunchboxes or picnics.